SAT Math : SAT Mathematics

Study concepts, example questions & explanations for SAT Math

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Example Questions

Example Question #101 : Integers

The result of a number divided by 2 is the same as the result of that number divided by 10. What is that number?

Possible Answers:

10

2

0

1

Correct answer:

0

Explanation:

0 is the only choice that yields the same answer (0) when divided by 2 and 10. You can check this easily by plugging a few of the answer choices into a fraction:

1/2 ≠ 1/10

2/2 ≠ 2/10 etc.

Example Question #102 : Integers

If x and y are positive integers and 2y = 16x, what is the value of y/x?

Possible Answers:

4

2

1/2

1/4

Correct answer:

4

Explanation:

Making the equation even yields y = 4 and x = 1, since 24 = 16. This makes y/x = 4.

Example Question #1 : How To Divide Integers

If \dpi{100} \small y is an integer, and 3 is the remainder when \dpi{100} \small 7y+2 is divided by 5, then which of the following is a possible value of \dpi{100} \small y?

Possible Answers:

9

2

5

1

8

Correct answer:

8

Explanation:

For this problem, you need to use process of elimination.

When \dpi{100} \small y=8\rightarrow 7\times 8+2=58

The remainder of \dpi{100} \small \frac{58}{5} is 3 (the answer is 11, remainder 3), so \dpi{100} \small y=8 is a possible answer choice. If you try the other answers they won't work.

Example Question #1 : How To Subtract Integers

The annual number of cellular phones purchased from a company is illustrated in the following graph. How many more phones were sold in 2009 than 2011?

Possible Answers:

6

17

3,000

17,000

6,000

Correct answer:

6,000

Explanation:

In 2009, 32,000 phones were sold (according the the label on the y-axis, each number is equal to 1,000 phones). In 2011, 26,000 phones were sold.

\small 32,000-26,000=6,000

Example Question #1741 : Sat Mathematics

F=ma in physics whereForce=mass\times acceleration.

If the mass is increased by 3 three times the original and the acceleration is increased by 7 times the original, how many times greater is the new force than the original force?

Possible Answers:

21

0

10

7

3

Correct answer:

21

Explanation:

We simply multiply the new mass by the new acceleration to obtain a new force that is 21 times greater than the original.

Example Question #1742 : Sat Mathematics

An office wants to buy 22 computers at $900 each. The budget is $20,000 and the tax on computers is 9%. How many computers can the office afford?

Possible Answers:

Correct answer:

Explanation:

The office can only afford 20 computers.

1.09 * 900 = $981 is the actual price of each computer, with tax.

Divide:

20,000/981 = 20.39

Since the office cannot purchase a partial computer, we round down to 20 computers.

Example Question #865 : Arithmetic

A paint crew can paint  walls in  hours. At this rate, how many walls can the paint crew paint in  hours?

Possible Answers:

Correct answer:

Explanation:

First, divide  by  to determine how many walls the paint crew can paint in hour.

 divided by  is equal to .

Then, multiply this number by  hours.

Example Question #1 : Operations

Convert three yards to inches.

Possible Answers:

Correct answer:

Explanation:

To solve this problem, we need to know the conversions between yards to feet, and feet to inches.  Write their correct conversions.

Convert three yards to feet.

Convert nine feet to inches.

Example Question #867 : Arithmetic

Calculate  in the following series:

Possible Answers:

Correct answer:

Explanation:

Each element is obtained from the previous one by alternating the following operations: multiplying by 5 and adding 6.

If we let  be the first element, then 

Solve for :

 

Example Question #1 : How To Multiply Integers

Janet can pick between 10 and 20 tomatoes in an hour. What is a possible amount of time for Janet to pick 120 tomatoes?

Possible Answers:

Correct answer:

Explanation:

Since Janet can pick between 10 and 20 tomatoes in an hour, there is a range for which she can pick 120 tomatoes. Therefore, to find the possible amount of time it will take Janet to pick 120 tomatoes set up two fractions.

The first fraction will use the rate of 10 tomatoes an hour.

Therefore, identifying the variables are as follows.

Substituting these into the fraction results in a possible time

The second fraction will use the rate of 20 tomatoes an hour.

Therefore, identifying the variables are as follows.

Substituting these into the fraction results in a possible time

Of the answer selections 6 hours would be the correct answer.

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