COOP Quantitative Reasoning 2

Question 1

A store sells notebooks for $3 each. If Maria buys 8 notebooks and pays with a $30 bill, how much change does she receive?

Accepted Answer

$6

Answer

8 × $3 = $24, and $30 − $24 = $6 change.

Question 2

A rectangle has a length of 12 cm and a width of 5 cm. What is its perimeter?

Accepted Answer

34 cm

Answer

Perimeter = 2(12 + 5) = 2 × 17 = 34 cm.

Question 3

If a number is multiplied by 6 and then divided by 3, the result is 18. What is the number?

Accepted Answer

9

Answer

Let n × 6 ÷ 3 = 18, so 2n = 18, thus n = 9.

Question 4

What is 15% of 200?

Accepted Answer

30

Answer

15% of 200 = 0.15 × 200 = 30.

Question 5

A train travels 240 miles in 4 hours. What is its average speed?

Accepted Answer

60 mph

Answer

Speed = Distance ÷ Time = 240 ÷ 4 = 60 mph.

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