Crossover Aptitude Test Math 3

Question 1

The average of five numbers is 18. Four of them are 14, 20, 22, and 16. What is the fifth number?

Accepted Answer

18

Answer

Total sum = 5 × 18 = 90; 90 - 72 = 18.

Question 2

A rectangle has a perimeter of 48 cm and a width of 10 cm. What is its area?

Accepted Answer

140 cm²

Answer

Length = (48/2) - 10 = 14 cm; Area = 14 × 10 = 140 cm².

Question 3

Solve for x: 3(x - 4) = 2x + 1

Accepted Answer

13

Answer

3x - 12 = 2x + 1, so x = 13.

Question 4

A train travels from City A to City B in 3 hours at 80 mph. What is the distance?

Accepted Answer

240 miles

Answer

Distance = 80 × 3 = 240 miles.

Question 5

What is the least common multiple (LCM) of 12 and 18?

Accepted Answer

36

Answer

12 = 2²×3, 18 = 2×3²; LCM = 2²×3² = 36.

Crossover Aptitude Test Practice Test