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Free Math Worksheets — Over 100k free practice problems on Khan Academy
Looking for free math worksheets.
You’ve found something even better!
That’s because Khan Academy has over 100,000 free practice questions. And they’re even better than traditional math worksheets – more instantaneous, more interactive, and more fun!
Just choose your grade level or topic to get access to 100% free practice questions:
Kindergarten, basic geometry, pre-algebra, algebra basics, high school geometry.
- Trigonometry
Statistics and probability
High school statistics, ap®︎/college statistics, precalculus, differential calculus, integral calculus, ap®︎/college calculus ab, ap®︎/college calculus bc, multivariable calculus, differential equations, linear algebra.
- Addition and subtraction
- Place value (tens and hundreds)
- Addition and subtraction within 20
- Addition and subtraction within 100
- Addition and subtraction within 1000
- Measurement and data
- Counting and place value
- Measurement and geometry
- Place value
- Measurement, data, and geometry
- Add and subtract within 20
- Add and subtract within 100
- Add and subtract within 1,000
- Money and time
- Measurement
- Intro to multiplication
- 1-digit multiplication
- Addition, subtraction, and estimation
- Intro to division
- Understand fractions
- Equivalent fractions and comparing fractions
- More with multiplication and division
- Arithmetic patterns and problem solving
- Quadrilaterals
- Represent and interpret data
- Multiply by 1-digit numbers
- Multiply by 2-digit numbers
- Factors, multiples and patterns
- Add and subtract fractions
- Multiply fractions
- Understand decimals
- Plane figures
- Measuring angles
- Area and perimeter
- Units of measurement
- Decimal place value
- Add decimals
- Subtract decimals
- Multi-digit multiplication and division
- Divide fractions
- Multiply decimals
- Divide decimals
- Powers of ten
- Coordinate plane
- Algebraic thinking
- Converting units of measure
- Properties of shapes
- Ratios, rates, & percentages
- Arithmetic operations
- Negative numbers
- Properties of numbers
- Variables & expressions
- Equations & inequalities introduction
- Data and statistics
- Negative numbers: addition and subtraction
- Negative numbers: multiplication and division
- Fractions, decimals, & percentages
- Rates & proportional relationships
- Expressions, equations, & inequalities
- Numbers and operations
- Solving equations with one unknown
- Linear equations and functions
- Systems of equations
- Geometric transformations
- Data and modeling
- Volume and surface area
- Pythagorean theorem
- Transformations, congruence, and similarity
- Arithmetic properties
- Factors and multiples
- Reading and interpreting data
- Negative numbers and coordinate plane
- Ratios, rates, proportions
- Equations, expressions, and inequalities
- Exponents, radicals, and scientific notation
- Foundations
- Algebraic expressions
- Linear equations and inequalities
- Graphing lines and slope
- Expressions with exponents
- Quadratics and polynomials
- Equations and geometry
- Algebra foundations
- Solving equations & inequalities
- Working with units
- Linear equations & graphs
- Forms of linear equations
- Inequalities (systems & graphs)
- Absolute value & piecewise functions
- Exponents & radicals
- Exponential growth & decay
- Quadratics: Multiplying & factoring
- Quadratic functions & equations
- Irrational numbers
- Performing transformations
- Transformation properties and proofs
- Right triangles & trigonometry
- Non-right triangles & trigonometry (Advanced)
- Analytic geometry
- Conic sections
- Solid geometry
- Polynomial arithmetic
- Complex numbers
- Polynomial factorization
- Polynomial division
- Polynomial graphs
- Rational exponents and radicals
- Exponential models
- Transformations of functions
- Rational functions
- Trigonometric functions
- Non-right triangles & trigonometry
- Trigonometric equations and identities
- Analyzing categorical data
- Displaying and comparing quantitative data
- Summarizing quantitative data
- Modeling data distributions
- Exploring bivariate numerical data
- Study design
- Probability
- Counting, permutations, and combinations
- Random variables
- Sampling distributions
- Confidence intervals
- Significance tests (hypothesis testing)
- Two-sample inference for the difference between groups
- Inference for categorical data (chi-square tests)
- Advanced regression (inference and transforming)
- Analysis of variance (ANOVA)
- Scatterplots
- Data distributions
- Two-way tables
- Binomial probability
- Normal distributions
- Displaying and describing quantitative data
- Inference comparing two groups or populations
- Chi-square tests for categorical data
- More on regression
- Prepare for the 2020 AP®︎ Statistics Exam
- AP®︎ Statistics Standards mappings
- Polynomials
- Composite functions
- Probability and combinatorics
- Limits and continuity
- Derivatives: definition and basic rules
- Derivatives: chain rule and other advanced topics
- Applications of derivatives
- Analyzing functions
- Parametric equations, polar coordinates, and vector-valued functions
- Applications of integrals
- Differentiation: definition and basic derivative rules
- Differentiation: composite, implicit, and inverse functions
- Contextual applications of differentiation
- Applying derivatives to analyze functions
- Integration and accumulation of change
- Applications of integration
- AP Calculus AB solved free response questions from past exams
- AP®︎ Calculus AB Standards mappings
- Infinite sequences and series
- AP Calculus BC solved exams
- AP®︎ Calculus BC Standards mappings
- Integrals review
- Integration techniques
- Thinking about multivariable functions
- Derivatives of multivariable functions
- Applications of multivariable derivatives
- Integrating multivariable functions
- Green’s, Stokes’, and the divergence theorems
- First order differential equations
- Second order linear equations
- Laplace transform
- Vectors and spaces
- Matrix transformations
- Alternate coordinate systems (bases)
Frequently Asked Questions about Khan Academy and Math Worksheets
Why is khan academy even better than traditional math worksheets.
Khan Academy’s 100,000+ free practice questions give instant feedback, don’t need to be graded, and don’t require a printer.
Math Worksheets | Khan Academy |
---|---|
Math worksheets take forever to hunt down across the internet | Khan Academy is your one-stop-shop for practice from arithmetic to calculus |
Math worksheets can vary in quality from site to site | Every Khan Academy question was written by a math expert with a strong education background |
Math worksheets can have ads or cost money | Khan Academy is a nonprofit whose resources are always free to teachers and learners – no ads, no subscriptions |
Printing math worksheets use up a significant amount of paper and are hard to distribute during virtual learning | Khan Academy practice requires no paper and can be distributed whether your students are in-person or online |
Math worksheets can lead to cheating or a lack of differentiation since every student works on the same questions | Khan Academy has a full question bank to draw from, ensuring that each student works on different questions – and at their perfect skill level |
Math worksheets can slow down student learning since they need to wait for feedback | Khan Academy gives instant feedback after every answer – including hints and video support if students are stuck |
Math worksheets take up time to collect and take up valuable planning time to grade | Khan Academy questions are graded instantly and automatically for you |
What do Khan Academy’s interactive math worksheets look like?
Here’s an example:
What are teachers saying about Khan Academy’s interactive math worksheets?
“My students love Khan Academy because they can immediately learn from their mistakes, unlike traditional worksheets.”
Is Khan Academy free?
Khan Academy’s practice questions are 100% free—with no ads or subscriptions.
What do Khan Academy’s interactive math worksheets cover?
Our 100,000+ practice questions cover every math topic from arithmetic to calculus, as well as ELA, Science, Social Studies, and more.
Is Khan Academy a company?
Khan Academy is a nonprofit with a mission to provide a free, world-class education to anyone, anywhere.
Want to get even more out of Khan Academy?
Then be sure to check out our teacher tools . They’ll help you assign the perfect practice for each student from our full math curriculum and track your students’ progress across the year. Plus, they’re also 100% free — with no subscriptions and no ads.
Get Khanmigo
The best way to learn and teach with AI is here. Ace the school year with our AI-powered guide, Khanmigo.
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Math Worksheets
Test your math skills! Ace that test! See how far you can get! You can view them on-screen, and then print them, with or without answers.
Every worksheet has thousands of variations, so you need never run out of practice material.
Choose your Subject !
+ | ||
− | ||
× | ||
÷ | (includes the correct spaces to help you get it right) | |
123 | My Daughter loves these! | |
0.1 | + − × ÷, and conversion from fractions | |
/ , / | + − × ÷, and conversion | |
/ , / | + − × ÷, and conversion | |
Example: 12 + 8 × (5 − 4) | ||
Example: 2x + 8 = 16 | ||
3:30 | "Tell the time" and "Draw the hands" |
* Note: the worksheet variation number is not printed with the worksheet on purpose so others cannot simply look up the answers. If you want the answers, either bookmark the worksheet or print the answers straight away.
Also! Our forum members have put together a collection of Math Exercises .
Reading & Math for K-5
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Free Math Worksheets
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Category: Practice Questions
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Free Math Printable Worksheets with Answer Keys and Activities
Other free resources.
Feel free to download and enjoy these free worksheets on functions and relations. Each one has model problems worked out step by step, practice problems, as well as challenge questions at the sheets end. Plus each one comes with an answer key.
- Long Division with Remainders
- Long Division with Remainders #2 (Zeros in the Quotient)
- Long Division with 2 Digit Divisors
- Whole Number by Unit Fraction
- Equation of Circle
- Simplify Imaginary Numbers
- Adding and Subtracting Complex Numbers
- Multiplying Complex Numbers
- Dividing Complex Numbers
- Dividing Complex Number (Advanced)
- End of Unit, Review Sheet
- Distance Formula
- Simplify Rational Exponents (Algebra 2)
- Solve Equations with Rational Exponents (Algebra 2)
- Solve Equations with variables in Exponents (Algebra 2)
- Exponential Growth (no answer key on this one, sorry)
- Compound Interest Worksheet #1 (No logs)
- Compound Interest Worksheet (Logarithms required)
- Factor Trinomials Worksheet
- Factor by Grouping
- Domain and Range (Algebra 1)
- Functions vs Relations (Distinguish function from relation, state domain etc..) (Algebra 2)
- Evaluating Functions (Algebra 2)
- 1 to 1 Functions (Algebra 2)
- Composition of Functions (Algebra 2)
- Inverse Functions Worksheet (Algebra 2)
- Operations with Functions (Algebra 2)
- Functions Review Worksheet (Algebra 2)
- Logarithmic Equations
- Properties of Logarithms Worksheet
- Product Rule of Logarithms
- Power Rule of Logarithms
- Quotient Rule of Logarithms
- Solve Quadratic Equations by Factoring
- Quadratic Formula Worksheets (3 different sheets)
- Quadratic Formula Worksheet (Real solutions)
- Quadratic Formula (Complex solutions)
- Quadratic Formula (Both real and complex solutions)
- Discriminant and Nature of the Roots
- Solve Quadratic Equations by Completing the Square
- Sum and Product of Roots
- Radical Equations
- Mixed Problems on Writing Equations of Lines
- Slope Intercept Form Worksheet
- Standard Form Worksheet
- Point Slope Worksheet
- Write Equation of Line from the Slope and 1 Point
- Write Equation of Line From Two Points
- Equation of Line Parallel to Another Line and Through a Point
- Equation of Line Perpendicular to Another Line and Through a Point
- Slope of a Line
- Perpendicular Bisector of Segment
- Write Equation of Line Mixed Review
- Word Problems
- Multiplying Monomials Worksheet
- Multiplying and Dividing Monomials Sheet
- Adding and Subtracting Polynomials worksheet
- Multiplying Monomials with Polynomials Worksheet
- Multiplying Binomials Worksheet
- Multiplying Polynomials
- Simplifying Polynomials
- Factoring Trinomials
- Operations with Polynomials Worksheet
- Dividing Radicals
- Simplify Radicals Worksheet
- Adding Radicals
- Multiplying Radicals Worksheet
- Radicals Review (Mixed review worksheet on radicals and square roots)
- Rationalizing the Denominator (Algebra 2)
- Radical Equations (Algebra 2)
- Solve Systems of Equations Graphically
- Solve Systems of Equations by Elimination
- Solve by Substitution
- Solve Systems of Equations (Mixed Review)
- Activity on Systems of Equations (Create an advertisement for your favorite method to Solve Systems of Equations )
- Real World Connections (Compare cell phone plans)
- Identifying Fractions
Trigonomnetry
- Law of Sines and Cosines Worksheet (This sheet is a summative worksheet that focuses on deciding when to use the law of sines or cosines as well as on using both formulas to solve for a single triangle's side or angle)
- Law of Sines
- Ambiguous Case of the Law of Sines
- Law of Cosines
- Vector Worksheet
- Sine, Cosine, Tangent, to Find Side Length
- Sine, Cosine, Tangent Chart
- Inverse Trig Functions
- Real World Applications of SOHCATOA
- Mixed Review
- Unit Circle Worksheet
- Graphing Sine and Cosine Worksheet
- Sine Cosine Graphs with Vertical Translations
- Sine, Cosine, Tangent Graphs with Phase Shifts
- Sine, Cosine, Tangent Graphs with Change in Period, Amplitude and Phase Shifts (All Translations)
- Tangent Equation, Graph Worksheet
- Graphing Sine, Cosine, Tangent with Change in Period
- Cumulative, Summative Worksheet on Periodic Trig Functions - period, amplitude, phase shift, radians, degrees,unit circle
- Ratio and Proportion
- Similar Polygons
- Area of Triangle
- Interior Angles of Polygons
- Exterior Angles of Polygons
- Identifying Fractions Worksheet
- Associated Powerpoint
- Simplify Fractions Worksheet (Regular Difficulty)
- Associated PowerPoint
- Simplify Fractions Worksheet (Challenging Difficulty level for advanced learners)
- System of Linear Equations Worksheet
- System of Linear Equations - Real World Application
- Compositions of Reflections. Reflections Over Intersecting Lines as Rotations
All of these worksheets and activities are available for free so long as they are used solely for educational, noncommercial purposes and are not distributed outside of a specific teacher's classroom.
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Intermediate algebra, advanced algebra, algebra word problems, math proofs, number theory, master math with confidence…practice makes perfect.
Math can be challenging, but it is not difficult. As a math teacher, my goal is to encourage students just like you to solve as many problems as you can. With a lot of practice, you will build confidence, and in the process, develop your mathematical skills.
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Math Games offers online games and printable worksheets to make learning math fun. Kids from pre-K to 8th grade can practice math skills recommended by the Common Core State Standards in exciting game formats. Never associated learning algebra with rescuing animals or destroying zombies? Time to think again!
Kids learn better when they're having fun . They also learn better when they get to practice new skills repeatedly . Math Games lets them do both - in school or at home .
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What can QuickMath do?
QuickMath will automatically answer the most common problems in algebra, equations and calculus faced by high-school and college students.
- The algebra section allows you to expand, factor or simplify virtually any expression you choose. It also has commands for splitting fractions into partial fractions, combining several fractions into one and cancelling common factors within a fraction.
- The equations section lets you solve an equation or system of equations. You can usually find the exact answer or, if necessary, a numerical answer to almost any accuracy you require.
- The inequalities section lets you solve an inequality or a system of inequalities for a single variable. You can also plot inequalities in two variables.
- The calculus section will carry out differentiation as well as definite and indefinite integration.
- The matrices section contains commands for the arithmetic manipulation of matrices.
- The graphs section contains commands for plotting equations and inequalities.
- The numbers section has a percentages command for explaining the most common types of percentage problems and a section for dealing with scientific notation.
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The Must-Have Math AI & Calculator for Students
Don't stress over math for another minute. Instantly get step-by-step solutions to all types of math problems. Try our math solver for free.
Instantly Solve Math Problems with Our Math AI Tool
Stop searching for math answers in the back of the textbook. Mathful's math solver shows you how to get there yourself. Type or upload a photo of any math question, and we will provide the full working out, so you can learn as you go.
Cutting-Edge Photo Math Solver that Outshines ChatGPT
Our photo math solver can instantly scan image uploads of math problems to provide step-by-step solutions with unmatched accuracy and precision, making it a far more powerful alternative to conversational AI tools like ChatGPT.
Key Features of Our Powerful Math AI Solver
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Our AI math problem solver helps you effortlessly handle questions in various mathematical subjects, including algebra, calculus, geometry, and more.
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Quick & Precise Math Calculator With Steps
Using advanced AI algorithms, our step-by-step math calculator can process complex math problems to generate accurate and detailed solutions in seconds. They include:
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Have trouble with a math problem or just want to check your work? Our math AI is ready to help. Here's how:
Input Your Math Problem
Type the math problem into the input box or upload an image of the math problem. Alternatively, input the problem into our math calculator.
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Math AI tools like Mathful are designed to assist users in solving mathematical problems, equations, and calculations. We utilize machine learning algorithms and natural language processing to interpret user input, perform complex computations, and provide step-by-step solutions.
Math AI can be beneficial for students, researchers, and professionals who require assistance in understanding and solving mathematical problems efficiently.
Can a math AI help me improve my math grades in school?
Certainly! A math solver like Mathful can significantly boost your math grade by offering round-the-clock access to step-by-step solutions across a wide array of math topics, from algebra to calculus.
Does this math AI tool cover all types of math?
Yes, Mathful is capable of tackling any type of math question, from arithmetic and geometry to algebra and number theory.
How long does it take for the math AI solver to get an answer to my math question?
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Why should I use a photo math solver?
By using a photo math solver, you can simply take a photo of a math problem. No more need to type out complex equations or search for similar examples online. It's an instant way to begin tackling your math homework or study questions.
What problems can I solve with a math calculator?
With a math calculator from Mathful, you can solve a broad spectrum of mathematical problems across various domains, including basic arithmetic operations, algebraic equations, and geometry calculations to more complex calculus derivatives and integrals.
Solve Math Problems Easily with Our Math Solver & Math Calculator
Get instant, accurate answers to your math problems and boost your math grade. Try our AI math problem solver and math calculator with steps for free today.
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Baseline Assessment - Part Two
Y7 Sparx Maths Baseline Assessment - National results and insights
Meet the team - SST
Meet the members of the School Success Team
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The 15 Hardest SAT Math Questions Ever
Want to test yourself against the most difficult SAT math questions? Want to know what makes these questions so difficult and how best to solve them? If you're ready to really sink your teeth into the SAT math section and have your sights set on that perfect score, then this is the guide for you.
We've put together what we believe to be the 15 most difficult questions for the current Digital SAT , with strategies and answer explanations for each. These are all hard SAT Math questions from College Board SAT practice tests, which means understanding them is one of the best ways to study for those of you aiming for perfection.
Image: Sonia Sevilla /Wikimedia
Brief Overview of SAT Math
There are two sections on the SAT: SAT Reading and Writing and SAT Math . Both sections are divided into two modules, and SAT Reading and Writing always comes first. So, the S AT Math modules will be the 3rd and 4th modules you’ll see on test day. Both math modules allow you to use a calculator.
Each math module is arranged in order of ascending difficulty (where the longer it takes to solve a problem and the fewer people who answer it correctly, the more difficult it is). On each module, question 1 will be "easy" and question 22 will be considered "difficult." The modules are made up of both multiple choice and grid-in questions , and there isn’t a particular order for grid-ins—they can come anywhere in the module and be of any difficulty. 75% of SAT Math questions are multiple choice and 25% are grid-ins.
With very few exceptions, then, the most difficult SAT math problems will be clustered at the end of each module. In addition to their placement on the test, though, these questions also share a few other commonalities. In a minute, we'll look at example questions and how to solve them, then analyze them to figure out what these types of questions have in common.
But First: Should You Be Focusing on the Hardest Math Questions Right Now?
If you're just getting started in your study prep (or if you've simply skipped this first, crucial step), definitely stop and take a full practice test to gauge your current scoring level. Check out our guide to all the free SAT practice tests available online and then sit down to take a test all at once.
The absolute best way to assess your current level is to simply take the SAT practice test as if it were real , keeping strict timing and working straight through with only the allowed breaks (we know—probably not your favorite way to spend a Saturday). Once you've got a good idea of your current level and percentile ranking, you can set milestones and goals for your ultimate SAT Math score.
If you're currently scoring in the 200-400 or the 400-600 range on SAT Math, your best bet is first to check out our guide to improving your math score to be consistently at or over a 600 before you start in trying to tackle the most difficult math problems on the test.
If, however, you're already scoring above a 600 on the Math section and want to test your mettle for the real SAT, then definitely proceed to the rest of this guide. If you're aiming for perfect (or close to) , then you'll need to know what the most difficult SAT math questions look like and how to solve them. And luckily, that's exactly what we'll do.
There are a limited number of official SAT practice tests, especially now that the SAT has gone completely digital. We recommend beginning with the six official, digital SAT practice tests available through College Board’s Bluebook software. If you’ve finished those and want even more prep, though, there are lots of older (but still officially produced by the College Board) tests you can use. Most of the questions below are from these practice tests, so if you’re worried about spoiling those tests, stop reading this guide now and come back when you’ve completed all the older official practice tests.
Now let's get to our list of questions (whoo)!
Image: Niytx /DeviantArt
The 15 Hardest SAT Math Questions
Now that you're sure you should be attempting these questions, let's dive right in! We've curated 15 of the most difficult SAT Math questions for you to try below, along with walkthroughs of how to get the answer (if you're stumped).
$$C=5/9(F-32)$$
The equation above shows how temperature $F$, measured in degrees Fahrenheit, relates to a temperature $C$, measured in degrees Celsius. Based on the equation, which of the following must be true?
- A temperature increase of 1 degree Fahrenheit is equivalent to a temperature increase of $5/9$ degree Celsius.
- A temperature increase of 1 degree Celsius is equivalent to a temperature increase of 1.8 degrees Fahrenheit.
- A temperature increase of $5/9$ degree Fahrenheit is equivalent to a temperature increase of 1 degree Celsius.
A) I only B) II only C) III only D) I and II only
ANSWER EXPLANATION: Think of the equation as an equation for a line
where in this case
$$C= {5}/{9} (F−32)$$
$$C={5}/{9}F −{5}/{9}(32)$$
You can see the slope of the graph is ${5}/{9}$, which means that for an increase of 1 degree Fahrenheit, the increase is ${5}/{9}$ of 1 degree Celsius.
$$C= {5}/{9} (F)$$
$$C= {5}/{9} (1)= {5}/{9}$$
Therefore, statement I is true. This is the equivalent to saying that an increase of 1 degree Celsius is equal to an increase of ${9}/{5}$ degrees Fahrenheit.
$$1= {5}/{9} (F)$$
$$(F)={9}/{5}$$
Since ${9}/{5}$ = 1.8, statement II is true.
The only answer that has both statement I and statement II as true is D , but if you have time and want to be absolutely thorough, you can also check to see if statement III (an increase of ${5}/{9}$ degree Fahrenheit is equal to a temperature increase of 1 degree Celsius) is true:
$$C= {5}/{9} ({5}/{9})$$
$$C= {25} /{81} (\which \is ≠ 1)$$
An increase of $5/9$ degree Fahrenheit leads to an increase of ${25}/{81}$, not 1 degree, Celsius, and so Statement III is not true.
The final answer is D.
The equation ${24x^2 + 25x -47}/{ax-2} = -8x-3-{53/{ax-2}}$ is true for all values of $x≠2/a$, where $a$ is a constant.
What is the value of $a$?
A) -16 B) -3 C) 3 D) 16
ANSWER EXPLANATION: There are two ways to solve this question. The faster way is to multiply each side of the given equation by $ax-2$ (so you can get rid of the fraction). When you multiply each side by $ax-2$, you should have:
$$24x^2 + 25x - 47 = (-8x-3)(ax-2) - 53$$
You should then multiply $(-8x-3)$ and $(ax-2)$ using FOIL.
$$24x^2 + 25x - 47 = -8ax^2 - 3ax +16x + 6 - 53$$
Then, reduce on the right side of the equation
$$24x^2 + 25x - 47 = -8ax^2 - 3ax +16x - 47$$
Since the coefficients of the $x^2$-term have to be equal on both sides of the equation, $−8a = 24$, or $a = −3$.
The other option which is longer and more tedious is to attempt to plug in all of the answer choices for a and see which answer choice makes both sides of the equation equal. Again, this is the longer option, and I do not recommend it for the actual SAT as it will waste too much time.
The final answer is B.
If $3x-y = 12$, what is the value of ${8^x}/{2^y}$?
A) $2^{12}$ B) $4^4$ C) $8^2$ D) The value cannot be determined from the information given.
ANSWER EXPLANATION: One approach is to express
$${8^x}/{2^y}$$
so that the numerator and denominator are expressed with the same base. Since 2 and 8 are both powers of 2, substituting $2^3$ for 8 in the numerator of ${8^x}/{2^y}$ gives
$${(2^3)^x}/{2^y}$$
which can be rewritten
$${2^3x}/{2^y}$$
Since the numerator and denominator of have a common base, this expression can be rewritten as $2^(3x−y)$. In the question, it states that $3x − y = 12$, so one can substitute 12 for the exponent, $3x − y$, which means that
$${8^x}/{2^y}= 2^12$$
The final answer is A.
Points A and B lie on a circle with radius 1, and arc ${AB}↖⌢$ has a length of $π/3$. What fraction of the circumference of the circle is the length of arc ${AB}↖⌢$?
ANSWER EXPLANATION: To figure out the answer to this question, you'll first need to know the formula for finding the circumference of a circle.
The circumference, $C$, of a circle is $C = 2πr$, where $r$ is the radius of the circle. For the given circle with a radius of 1, the circumference is $C = 2(π)(1)$, or $C = 2π$.
To find what fraction of the circumference the length of ${AB}↖⌢$ is, divide the length of the arc by the circumference, which gives $π/3 ÷ 2π$. This division can be represented by $π/3 * {1/2}π = 1/6$.
The fraction $1/6$ can also be rewritten as $0.166$ or $0.167$.
The final answer is $1/6$, $0.166$, or $0.167$.
$${8-i}/{3-2i}$$
If the expression above is rewritten in the form $a+bi$, where $a$ and $b$ are real numbers, what is the value of $a$? (Note: $i=√{-1}$)
ANSWER EXPLANATION: To rewrite ${8-i}/{3-2i}$ in the standard form $a + bi$, you need to multiply the numerator and denominator of ${8-i}/{3-2i}$ by the conjugate, $3 + 2i$. This equals
$$({8-i}/{3-2i})({3+2i}/{3+2i})={24+16i-3+(-i)(2i)}/{(3^2)-(2i)^2}$$
Since $i^2=-1$, this last fraction can be reduced simplified to
$$ {24+16i-3i+2}/{9-(-4)}={26+13i}/{13}$$
which simplifies further to $2 + i$. Therefore, when ${8-i}/{3-2i}$ is rewritten in the standard form a + bi, the value of a is 2.
In triangle $ABC$, the measure of $∠B$ is 90°, $BC=16$, and $AC$=20. Triangle $DEF$ is similar to triangle $ABC$, where vertices $D$, $E$, and $F$ correspond to vertices $A$, $B$, and $C$, respectively, and each side of triangle $DEF$ is $1/3$ the length of the corresponding side of triangle $ABC$. What is the value of $sinF$?
ANSWER EXPLANATION: Triangle ABC is a right triangle with its right angle at B. Therefore, $\ov {AC}$ is the hypotenuse of right triangle ABC, and $\ov {AB}$ and $\ov {BC}$ are the legs of right triangle ABC. According to the Pythagorean theorem,
$$AB =√{20^2-16^2}=√{400-256}=√{144}=12$$
Since triangle DEF is similar to triangle ABC, with vertex F corresponding to vertex C, the measure of $\angle ∠ {F}$ equals the measure of $\angle ∠ {C}$. Therefore, $sin F = sin C$. From the side lengths of triangle ABC,
$$sinF ={\opposite \side}/{\hypotenuse}={AB}/{AC}={12}/{20}={3}/{5}$$
Therefore, $sinF ={3}/{5}$.
The final answer is ${3}/{5}$ or 0.6.
The incomplete table above summarizes the number of left-handed students and right-handed students by gender for the eighth grade students at Keisel Middle School. There are 5 times as many right-handed female students as there are left-handed female students, and there are 9 times as many right-handed male students as there are left-handed male students. if there is a total of 18 left-handed students and 122 right-handed students in the school, which of the following is closest to the probability that a right-handed student selected at random is female? (Note: Assume that none of the eighth-grade students are both right-handed and left-handed.)
A) 0.410 B) 0.357 C) 0.333 D) 0.250
ANSWER EXPLANATION: In order to solve this problem, you should create two equations using two variables ($x$ and $y$) and the information you're given. Let $x$ be the number of left-handed female students and let $y$ be the number of left-handed male students. Using the information given in the problem, the number of right-handed female students will be $5x$ and the number of right-handed male students will be $9y$. Since the total number of left-handed students is 18 and the total number of right-handed students is 122, the system of equations below must be true:
$$x + y = 18$$
$$5x + 9y = 122$$
When you solve this system of equations, you get $x = 10$ and $y = 8$. Thus, 5*10, or 50, of the 122 right-handed students are female. Therefore, the probability that a right-handed student selected at random is female is ${50}/{122}$, which to the nearest thousandth is 0.410.
Questions 8 & 9
Use the following information for both question 7 and question 8.
If shoppers enter a store at an average rate of $r$ shoppers per minute and each stays in the store for average time of $T$ minutes, the average number of shoppers in the store, $N$, at any one time is given by the formula $N=rT$. This relationship is known as Little's law.
The owner of the Good Deals Store estimates that during business hours, an average of 3 shoppers per minute enter the store and that each of them stays an average of 15 minutes. The store owner uses Little's law to estimate that there are 45 shoppers in the store at any time.
Little's law can be applied to any part of the store, such as a particular department or the checkout lines. The store owner determines that, during business hours, approximately 84 shoppers per hour make a purchase and each of these shoppers spend an average of 5 minutes in the checkout line. At any time during business hours, about how many shoppers, on average, are waiting in the checkout line to make a purchase at the Good Deals Store?
ANSWER EXPLANATION: Since the question states that Little's law can be applied to any single part of the store (for example, just the checkout line), then the average number of shoppers, $N$, in the checkout line at any time is $N = rT$, where $r$ is the number of shoppers entering the checkout line per minute and $T$ is the average number of minutes each shopper spends in the checkout line.
Since 84 shoppers per hour make a purchase, 84 shoppers per hour enter the checkout line. However, this needs to be converted to the number of shoppers per minute (in order to be used with $T = 5$). Since there are 60 minutes in one hour, the rate is ${84 \shoppers \per \hour}/{60 \minutes} = 1.4$ shoppers per minute. Using the given formula with $r = 1.4$ and $T = 5$ yields
$$N = rt = (1.4)(5) = 7$$
Therefore, the average number of shoppers, $N$, in the checkout line at any time during business hours is 7.
The final answer is 7.
The owner of the Good Deals Store opens a new store across town. For the new store, the owner estimates that, during business hours, an average of 90 shoppers per hour enter the store and each of them stays an average of 12 minutes. The average number of shoppers in the new store at any time is what percent less than the average number of shoppers in the original store at any time? (Note: Ignore the percent symbol when entering your answer. For example, if the answer is 42.1%, enter 42.1)
ANSWER EXPLANATION: According to the original information given, the estimated average number of shoppers in the original store at any time (N) is 45. In the question, it states that, in the new store, the manager estimates that an average of 90 shoppers per hour (60 minutes) enter the store, which is equivalent to 1.5 shoppers per minute (r). The manager also estimates that each shopper stays in the store for an average of 12 minutes (T). Thus, by Little's law, there are, on average, $N = rT = (1.5)(12) = 18$ shoppers in the new store at any time. This is
$${45-18}/{45} * 100 = 60$$
percent less than the average number of shoppers in the original store at any time.
The final answer is 60.
Question 10
In the $xy$-plane, the point $(p,r)$ lies on the line with equation $y=x+b$, where $b$ is a constant. The point with coordinates $(2p, 5r)$ lies on the line with equation $y=2x+b$. If $p≠0$, what is the value of $r/p$?
ANSWER EXPLANATION: Since the point $(p,r)$ lies on the line with equation $y=x+b$, the point must satisfy the equation. Substituting $p$ for $x$ and $r$ for $y$ in the equation $y=x+b$ gives $r=p+b$, or $\bi b$ = $\bi r-\bi p$.
Similarly, since the point $(2p,5r)$ lies on the line with the equation $y=2x+b$, the point must satisfy the equation. Substituting $2p$ for $x$ and $5r$ for $y$ in the equation $y=2x+b$ gives:
$5r=2(2p)+b$
$\bi b$ = $\bo 5 \bi r-\bo 4\bi p$.
Next, we can set the two equations equal to $b$ equal to each other and simplify:
$b=r-p=5r-4p$
Finally, to find $r/p$, we need to divide both sides of the equation by $p$ and by $4$:
The correct answer is B , $3/4$.
If you picked choices A and D, you may have incorrectly formed your answer out of the coefficients in the point $(2p, 5r)$. If you picked Choice C, you may have confused $r$ and $p$.
Note that while this is in the calculator section of the SAT, you absolutely do not need your calculator to solve it!
Question 11
A) 261.8 B) 785.4 C) 916.3 D) 1047.2
ANSWER EXPLANATION: The volume of the grain silo can be found by adding the volumes of all the solids of which it is composed (a cylinder and two cones). The silo is made up of a cylinder (with height 10 feet and base radius 5 feet) and two cones (each with height 5 ft and base radius 5 ft). The formulas given at the beginning of the SAT Math section:
Volume of a Cone
$$V={1}/{3}πr^2h$$
Volume of a Cylinder
$$V=πr^2h$$
can be used to determine the total volume of the silo. Since the two cones have identical dimensions, the total volume, in cubic feet, of the silo is given by
$$V_{silo}=π(5^2)(10)+(2)({1}/{3})π(5^2)(5)=({4}/{3})(250)π$$
which is approximately equal to 1,047.2 cubic feet.
Question 12
If $x$ is the average (arithmetic mean) of $m$ and $9$, $y$ is the average of $2m$ and $15$, and $z$ is the average of $3m$ and $18$, what is the average of $x$, $y$, and $z$ in terms of $m$?
A) $m+6$ B) $m+7$ C) $2m+14$ D) $3m + 21$
ANSWER EXPLANATION: Since the average (arithmetic mean) of two numbers is equal to the sum of the two numbers divided by 2, the equations $x={m+9}/{2}$, $y={2m+15}/{2}$, $z={3m+18}/{2}$are true. The average of $x$, $y$, and $z$ is given by ${x + y + z}/{3}$. Substituting the expressions in m for each variable ($x$, $y$, $z$) gives
$$[{m+9}/{2}+{2m+15}/{2}+{3m+18}/{2}]/3$$
This fraction can be simplified to $m + 7$.
Question 13
The function $f(x)=x^3-x^2-x-{11/4}$ is graphed in the $xy$-plane above. If $k$ is a constant such that the equation $f(x)=k$ has three real solutions, which of the following could be the value of $k$?
ANSWER EXPLANATION: The equation $f(x) = k$ gives the solutions to the system of equations
$$y = f(x) = x^3-x^2-x-{11}/{4}$$
A real solution of a system of two equations corresponds to a point of intersection of the graphs of the two equations in the $xy$-plane.
The graph of $y = k$ is a horizontal line that contains the point $(0, k)$ and intersects the graph of the cubic equation three times (since it has three real solutions). Given the graph, the only horizontal line that would intersect the cubic equation three times is the line with the equation $y = −3$, or $f(x) = −3$. Therefore, $k$ is $-3$.
Question 14
$$q={1/2}nv^2$$
The dynamic pressure $q$ generated by a fluid moving with velocity $v$ can be found using the formula above, where $n$ is the constant density of the fluid. An aeronautical engineer users the formula to find the dynamic pressure of a fluid moving with velocity $v$ and the same fluid moving with velocity 1.5$v$. What is the ratio of the dynamic pressure of the faster fluid to the dynamic pressure of the slower fluid?
ANSWER EXPLANATION: To solve this problem, you need to set up to equations with variables. Let $q_1$ be the dynamic pressure of the slower fluid moving with velocity $v_1$, and let $q_2$ be the dynamic pressure of the faster fluid moving with velocity $v_2$. Then
$$v_2 =1.5v_1$$
Given the equation $q = {1}/{2}nv^2$, substituting the dynamic pressure and velocity of the faster fluid gives $q_2 = {1}/{2}n(v_2)^2$. Since $v_2 =1.5v_1$, the expression $1.5v_1$ can be substituted for $v_2$ in this equation, giving $q_2 = {1}/{2}n(1.5v_1)^2$. By squaring $1.5$, you can rewrite the previous equation as
$$q_2 = (2.25)({1}/{2})n(v_1)^2 = (2.25)q_1$$
Therefore, the ratio of the dynamic pressure of the faster fluid is
$${q2}/{q1} = {2.25 q_1}/{q_1}= 2.25$$
The final answer is 2.25 or 9/4.
Question 15
For a polynomial $p(x)$, the value of $p(3)$ is $-2$. Which of the following must be true about $p(x)$?
A) $x-5$ is a factor of $p(x)$. B) $x-2$ is a factor of $p(x)$. C) $x+2$ is a factor of $p(x)$. D) The remainder when $p(x)$ is divided by $x-3$ is $-2$.
ANSWER EXPLANATION: If the polynomial $p(x)$ is divided by a polynomial of the form $x+k$ (which accounts for all of the possible answer choices in this question), the result can be written as
$${p(x)}/{x+k}=q(x)+{r}/{x+k}$$
where $q(x)$ is a polynomial and $r$ is the remainder. Since $x + k$ is a degree-1 polynomial (meaning it only includes $x^1$ and no higher exponents), the remainder is a real number.
Therefore, $p(x)$ can be rewritten as $p(x) = (x + k)q(x) + r$, where $r$ is a real number.
The question states that $p(3) = -2$, so it must be true that
$$-2 = p(3) = (3 + k)q(3) + r$$
Now we can plug in all the possible answers. If the answer is A, B, or C, $r$ will be $0$, while if the answer is D, $r$ will be $-2$.
A. $-2 = p(3) = (3 + (-5))q(3) + 0$ $-2=(3-5)q(3)$ $-2=(-2)q(3)$
This could be true, but only if $q(3)=1$
B. $-2 = p(3) = (3 + (-2))q(3) + 0$ $-2 = (3-2)q(3)$ $-2 = (-1)q(3)$
This could be true, but only if $q(3)=2$
C. $-2 = p(3) = (3 + 2)q(3) + 0$ $-2 = (5)q(3)$
This could be true, but only if $q(3)={-2}/{5}$
D. $-2 = p(3) = (3 + (-3))q(3) + (-2)$ $-2 = (3 - 3)q(3) + (-2)$ $-2 = (0)q(3) + (-2)$
This will always be true no matter what $q(3)$ is.
Of the answer choices, the only one that must be true about $p(x)$ is D, that the remainder when $p(x)$ is divided by $x-3$ is -2.
You deserve all the naps after running through those questions.
What Do the Hardest SAT Math Questions Have in Common?
It's important to understand what makes these hard questions "hard." By doing so, you'll be able to both understand and solve similar questions when you see them on test day, as well as have a better strategy for identifying and correcting your previous SAT math errors.
In this section, we'll look at what these questions have in common and give examples of each type. Some of the reasons why the hardest math questions are the hardest math questions is because they:
#1: Test Several Mathematical Concepts at Once
Here, we must deal with imaginary numbers and fractions all at once.
Secret to success: Think of what applicable math you could use to solve the problem, do one step at a time, and try each technique until you find one that works!
#2: Involve a Lot of Steps
Remember: the more steps you need to take, the easier to mess up somewhere along the line!
We must solve this problem in steps (doing several averages) to unlock the rest of the answers in a domino effect. This can get confusing, especially if you're stressed or running out of time.
Secret to success: Take it slow, take it step by step, and double-check your work so you don't make mistakes!
#3: Test Concepts That You Have Limited Familiarity With
For example, many students are less familiar with functions than they are with fractions and percentages, so most function questions are considered "high difficulty" problems.
If you don't know your way around functions , this would be a tricky problem.
Secret to success: Review math concepts that you don't have as much familiarity with such as functions . We suggest using our great free SAT Math review guides .
#4: Are Worded in Unusual or Convoluted Ways
It can be difficult to figure out exactly what some questions are asking , much less figure out how to solve them. This is especially true when the question is located at the end of the section, and you are running out of time.
Because this question provides so much information without a diagram, it can be difficult to puzzle through in the limited time allowed.
Secret to success: Take your time, analyze what is being asked of you, and draw a diagram if it's helpful to you.
#5: Use Many Different Variables
With so many different variables in play, it is quite easy to get confused.
Secret to success: Take your time, analyze what is being asked of you, and consider if plugging in numbers is a good strategy to solve the problem (it wouldn't be for the question above, but would be for many other SAT variable questions).
The Take-Aways
The SAT is a marathon and the better prepared you are for it, the better you'll feel on test day. Knowing how to handle the hardest questions the test can throw at you will make taking the real SAT seem a lot less daunting.
If you felt that these questions were easy, make sure not underestimate the effect of adrenaline and fatigue on your ability to solve problems. As you continue to study, always adhere to the proper timing guidelines and try to take full tests whenever possible. This is the best way to recreate the actual testing environment so that you can prepare for the real deal.
If you felt these questions were challenging, be sure to strengthen your math knowledge by checking out our individual math topic guides for the SAT . There, you'll see more detailed explanations of the topics in question as well as more detailed answer breakdowns.
What's Next?
Felt that these questions were harder than you were expecting? Take a look at all the topics covered in the SAT math section and then note which sections were particular difficulty for you. Next, take a gander at our individual math guides to help you shore up any of those weak areas.
Running out of time on the SAT math section? Our guide will help you beat the clock and maximize your score .
Aiming for a perfect score? Check out our guide on how to get a perfect 800 on the SAT math section , written by a perfect-scorer.
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Courtney scored in the 99th percentile on the SAT in high school and went on to graduate from Stanford University with a degree in Cultural and Social Anthropology. She is passionate about bringing education and the tools to succeed to students from all backgrounds and walks of life, as she believes open education is one of the great societal equalizers. She has years of tutoring experience and writes creative works in her free time.
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Kindergarten & Primary Math Worksheets Addition and Subtraction 1000 Questions & Answer Key
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Statistics and probability
Unit 1: analyzing categorical data, unit 2: displaying and comparing quantitative data, unit 3: summarizing quantitative data, unit 4: modeling data distributions, unit 5: exploring bivariate numerical data, unit 6: study design, unit 7: probability, unit 8: counting, permutations, and combinations, unit 9: random variables, unit 10: sampling distributions, unit 11: confidence intervals, unit 12: significance tests (hypothesis testing), unit 13: two-sample inference for the difference between groups, unit 14: inference for categorical data (chi-square tests), unit 15: advanced regression (inference and transforming), unit 16: analysis of variance (anova).
Quizard AI: Homework Helper 4+
Instant math problem solver, quizard ai, inc., designed for iphone.
- #53 in Education
- 4.7 • 31.3K Ratings
- Offers In-App Purchases
iPhone Screenshots
Description.
Homework & AI Answers Solver. Are you struggling to keep up with your homework and studying? Don't worry, Quizard is here to help! Quizard is a revolutionary AI answer app designed to help students at all levels conquer their studies. Now introducing our new feature - AI answers for math questions! Just snap a photo of your math problem, and Quizard's AI will deliver the solution, along with a comprehensive explanation. This makes Quizard the perfect tool not only for general studies but also for math homework help. Whether you’re a college student, high school student, or even an adult looking to brush up on your knowledge, Quizard is the perfect tool to help you succeed. With Quizard, you can quickly and easily get help with multiple-choice questions and short answer problems. You can quickly and easily prepare for quizzes, tests, and exams, allowing you to confidently ace them. Quizard is free to use! With Quizard, you can get the help you need to understand the material and gain a better understanding of the subject. Quizard is the perfect homework helper and personal tutor, providing you with the answers you need to succeed. With Quizard, you can get help with your homework and studying, so you can get better grades and have more free time. Stop struggling with your homework and start using Quizard today! Fine print: • Payment will be charged to your Apple ID account at the confirmation of purchase. • Offers and pricing are subject to change without notice. Terms of Use: https://lovely-vault-f15.notion.site/Terms-of-Use-18a469738fd74c9bb7c919981de4bbcd Privacy policy: https://lovely-vault-f15.notion.site/Privacy-Policy-4fe9e56db4a04d88af6e1b78f2874a7d Suggestions or questions? Email us at [email protected] TikTok: @quizard.ai Instagram: @quizard.ai
Version 1.9.7
We squashed some pesky bugs
Ratings and Reviews
31.3K Ratings
Trivia Meets Kaleidoscopic Chaos!
Quizzard might just be the hidden gem in the app store, assuming you like your learning served with a heaping spoonful of whimsy and a side of technicolor mayhem. The interface could be described as a unicorn's dream, painted in every hue of the rainbow and then some. It's so cheerfully bright, you'll forget whether you're here to learn or to play a round of digital laser tag. But it’s not all about looks; Quizzard delivers content with a zesty twist that keeps you on your toes. Trivia questions that make your brain do somersaults are the norm here. Ever wanted to decode the molecular structure of caffeine in under a minute or guess Shakespeare's favorite cheese? Quizzard makes such intellectual gymnastics delightful, and you’ll chuckle as much as you'll ponder. Plus, the ads, while frequent, are an adventure in themselves, offering you snippets of the outside world at the most unexpected moments. It’s like getting commercial breaks during your personal game show—annoying but part of the fun. So, strap in for a quiz experience that’s as entertaining as it is enlightening, where every question is a surprise party for your neurons!
GREAT LEARNING TOOL MADE BY A GENIUS DUDE!!! Quizard reads your question and like searches the web for similar information to come up with an answer. Quizard provides a paragraph explanation along with the short answer. READ THOROUGHLY bc it is a computer and sometimes the wording makes it come up with “the wrong (short) answer” even though throughout the (longer paragraph) explanation you can figure out the true answer that Quizard happened to word incorrectly or chose a similar but wrong multiple choice option for. If you’re not trying using it for just the short answer not bothering to read and check the answer and dont read the paragraph then ya.. some of your answers are gonna be wrong. But if it doesn’t give you the right answer it’ll at least provide some explanation to put you on the right path.
DO NOT GET THIS APP!
So, I’m in 4th grade, 4TH GRADE! & IT COULDN’T HELP ME CORRECTLY! So, you know in elementary school papers, & the printer will add these little pictures to the side, well, when i took a picture of this paper, quizard told me that “ I’m sorry, there’s a object in this paper, i cannot tell you the correct answer unless you cover it” ….. IM SORRY! IS A SMALL PICTURE DISTRACTING YOU!? & HOW IS PUTTING SOMETHING OVER IT GOING TO HELP!? Mm!? Well, i cover it, & it is so stupid! It can’t even proofread! It told me that the words that were “incorrect” (by the way, i fact checked it, & the words were correct) & it tells me that the correct answer for gymnasium is “gymnasuim” …i’m sorry, did you just make up a word? WHAT KIND OF AI ARE YOU!? So, i tell it that it’s incorrect, it’s actually “gymnasium” & it tells me, “ I’m sorry for the inconvenience, but can you explain the answer’s to me?” ….. WHY DO YOU THINK I GOT THIS APP!? I mean like, it’s not like I wanted YOU to explain it to me! So, yeah, I'm not going to sit there & waist my time trying to explain a ELEMENTARY SCHOOL PAPER TO AN AI! So, I definitely DON’T recommend this app. ( it’s not even worth 1 star )
App Privacy
The developer, Quizard AI, Inc. , indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Information
- Unlimited answers weekly $6.99
- quizard pro - monthly $9.99
- Quizard Pro Yearly $59.99
- quizard pro - monthly $19.99
- Quizard Pro Yearly $89.99
- Yearly Quizard Pro $39.99
- Quizard pro 6 months $49.99
- Quizard pro 6 months $69.99
- Yearly Quizard Pro $29.99
- Quizard Pro $39.99
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