ICET Mathematical Ability - Arithmetic 3

Question 1

What is the compound interest on $1,000 at 10% per annum for 2 years?

Accepted Answer

$210

Answer

CI = 1000 × (1.10)² − 1000 = 1210 − 1000 = $210.

Question 2

A boat goes 30 km upstream in 6 hours and 30 km downstream in 3 hours. What is the boat's speed in still water?

Accepted Answer

7.5 km/h

Answer

Upstream speed = 5 km/h, downstream speed = 10 km/h; boat speed = (5 + 10)/2 = 7.5 km/h.

Question 3

In how many ways can 4 people be seated in a row?

Accepted Answer

24

Answer

Number of arrangements = 4! = 4 × 3 × 2 × 1 = 24.

Question 4

The HCF and LCM of two numbers are 8 and 48 respectively. If one number is 16, find the other.

Accepted Answer

24

Answer

Other number = (HCF × LCM) ÷ first number = (8 × 48) ÷ 16 = 24.

Question 5

A man's salary increased from $3,000 to $3,600. What is the percentage increase?

Accepted Answer

20%

Answer

Percentage increase = (600/3000) × 100 = 20%.

ICET - Integrated Common Entrance Test Practice Test