ALEKS Arithmetic and Number Sense 3

Question 1

What is the square root of 144?

Accepted Answer

12

Answer

√144 = 12 because 12 × 12 = 144.

Question 2

Convert 5/4 to a mixed number.

Accepted Answer

1 1/4

Answer

5 ÷ 4 = 1 remainder 1, so 5/4 = 1 1/4.

Question 3

A car travels 180 miles in 3 hours. What is its average speed?

Accepted Answer

60 mph

Answer

Speed = distance ÷ time = 180 ÷ 3 = 60 mph.

Question 4

What is (-5) × (-8)?

Accepted Answer

40

Answer

A negative times a negative equals a positive, so (-5) × (-8) = 40.

Question 5

What is the value of 2⁴ ÷ 2²?

Accepted Answer

4

Answer

2⁴ ÷ 2² = 16 ÷ 4 = 4, or using exponent rules, 2^(4-2) = 2² = 4.

ALEKS - Assessment and Learning in Knowledge Spaces Practice Test