COOP COOP Mathematics Concepts 2

Question 1

Which of the following is a prime number?

Accepted Answer

29

Answer

29 is divisible only by 1 and itself, making it a prime number.

Question 2

What is the perimeter of a square with a side length of 7 inches?

Accepted Answer

28 in

Answer

Perimeter of a square = 4 × side = 4 × 7 = 28 inches.

Question 3

Simplify: 36 ÷ (4 + 2) × 3

Accepted Answer

18

Answer

Following order of operations: 36 ÷ 6 × 3 = 6 × 3 = 18.

Question 4

What is the median of the set {3, 7, 9, 2, 5}?

Accepted Answer

5

Answer

When ordered {2, 3, 5, 7, 9}, the middle value is 5.

Question 5

A train travels 120 miles in 2 hours. What is its average speed?

Accepted Answer

60 mph

Answer

Speed = Distance ÷ Time = 120 ÷ 2 = 60 mph.

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