Numerical Reasoning Aptitude 5

Question 1

A bag contains 4 red, 6 blue, and 5 green marbles. What is the probability of picking a blue marble at random?

Accepted Answer

2/5

Answer

P(blue) = 6/15 = 2/5.

Question 2

A worker completes 3/8 of a task in 6 hours. At the same rate, how many hours will the full task take?

Accepted Answer

16

Answer

6 hours covers 3/8, so full task = 6 / (3/8) = 6 x (8/3) = 16 hours.

Question 3

The price of a stock fell from $80 to $68. What is the percentage decrease?

Accepted Answer

15%

Answer

Decrease = 12; 12/80 x 100 = 15%.

Question 4

A square has an area of 196 sq cm. What is its perimeter?

Accepted Answer

56 cm

Answer

Side = square root of 196 = 14 cm; perimeter = 4 x 14 = 56 cm.

Question 5

A store bought 200 items at $4 each and sold all of them at $6.50 each. What was the total profit?

Accepted Answer

$500

Answer

Profit per item = $2.50; total profit = 200 x $2.50 = $500.

Numerical Reasoning Practice Test