ACT Math : ACT Math

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #1 : How To Subtract Integers

On an airline flight of 250 people there is a choice of pasta, salad, or pizza for dinner. If 113 passengers choose pasta and 30% choose salad, how many passengers choose pizza?

Possible Answers:

75

53

100

62

Correct answer:

62

Explanation:

30% of 250 is 75. Therefore, 250 – 75 – 113 = 62

Example Question #2 : How To Subtract Integers

At a store, a t-shirt costs . If Shane bought  t-shirts and shoes from the store for , how much were the shoes?

Possible Answers:

Correct answer:

Explanation:

If one shirt costs , then two shirts must cost . The difference of the total and this number is the cost of the the shoes.

Example Question #1 : How To Subtract Integers

 is equivalent to which of the following?

Possible Answers:

Correct answer:

Explanation:

To answer this question, we must remember how to distribute a negative when we are subtracting an entire expression.

To distribute a negative, you change the sign of everything within the expression being subtracted from positive to negative or negative to positive. You then add the resulting expression. So, for this data:

We can then add the like expressions normally (combine  with ,  with , and  with ). Therefore, for this data:

Therefore, our answer is .

Example Question #1 : How To Multiply Integers

A hockey team wants to purchase uniforms for its 26 players, 2 of which are goalies.  It costs $40 for a one-time designing fee.  It costs $24 for goalie jerseys and $20 for all other jerseys.   How much does it cost to purchase all of the uniforms?   

 

Possible Answers:

$528

$664

$520

$568

$608

Correct answer:

$568

Explanation:

There are 24 normal players and 2 goalies. Thus we can represent the sum in the equation 24($20) + 2($24) + $40 = $568. 

 

Example Question #1 : Operations

Sam is paid $15 per hour for laying bricks. If he lays 3,000 bricks at a rate of 5 bricks per minute, how much will he be paid?

Possible Answers:
$150
$1,500
$300
$200
$9,000
Correct answer: $150
Explanation:

First we need to convert some units. If Sam lays 5 bricks per minute, then multiply that figure by 60 to find that he lays 300 bricks per hour. 3,000 bricks divided by 300 bricks/hour means he worked for 10 hours. Therefore, when we mutiply $15/hour by 10 hours, we see he makes $150. 

Example Question #1 : Operations

Joey is beginning to invest in the stock market. He purchased 150 shares of a cell phone company.  The company pays a dividend of $2.55 per share. What is his total dividend?

Possible Answers:

$301.25

$280.25

$382.50

$255.00

$451.75

Correct answer:

$382.50

Explanation:

The words "per share" clues us into a multiplication problem, 150 * 2.55 = 382.50

Example Question #661 : Arithmetic

George is buying his first car. He has $500 for a downpayment and can afford monthly payments of $175 for three years. What is the most expensive car he can purchase?

Possible Answers:

$4,750

$8,000

$5,250

$6,800

$7.500

Correct answer:

$6,800

Explanation:

The most expensive car he can purchase is given by the total of all monthly payments and the down payment: $175 per month * 12 months per year * 3 years + $500 down = $6,800

Example Question #662 : Arithmetic

Given , convert 60 miles per hour to approximate feet per second.

Possible Answers:

Correct answer:

Explanation:

Using the factor-label method we get:

approximately equals 

The units are treated like numbers and are cancelled when they are in both the  numerator and denominator.

 

Example Question #3 : How To Multiply Integers

Which of the following expressions must be an even integer if x is an integer?

Possible Answers:

x/8

x6

3x

x + 3

Correct answer:

x6

Explanation:

An integer raised to an even power always yields an even integer. All of the other expressions could yield odd integers.

Example Question #1 : How To Multiply Integers

Each variable f, g, h, i, and j represents a positive real number. Considering the equations below, which of the four variables g, h, i, or j necesarily has the greatest value?

1.75g = f

1.69h = f

1.23i = f

0.46j = f

Possible Answers:

It cannot be determined without more information

j

h

i

g

Correct answer:

j

Explanation:

All four variables are positive real numbers. Each variable g, h, i, and j are multiplied by differing values to obtain the same value f. Since j is multiplied by the smallest value to obtain f it must be the greatest value. In this manner we could determine that g is necesarily the smallest value.

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