ICET Mathematical Ability - Arithmetic 2

Question 1

A can complete a work in 10 days and B in 15 days. In how many days can they complete it together?

Accepted Answer

6 days

Answer

Combined rate = 1/10 + 1/15 = 1/6, so they finish the work in 6 days.

Question 2

If the cost price of 10 items equals the selling price of 8 items, what is the profit percentage?

Accepted Answer

25%

Answer

Let CP per item = 1; then SP per item = 10/8 = 1.25, giving profit = 25%.

Question 3

A sum of money doubles itself in 8 years at simple interest. What is the rate of interest per annum?

Accepted Answer

12.5%

Answer

When money doubles, SI = P; R = (100 × P)/(P × 8) = 12.5%.

Question 4

Find the LCM of 12, 18, and 24.

Accepted Answer

72

Answer

LCM(12, 18, 24) = 2³ × 3² = 72.

Question 5

The average of 5 consecutive even numbers is 30. What is the largest number?

Accepted Answer

34

Answer

The middle (3rd) number equals the average = 30, so the five numbers are 26, 28, 30, 32, 34 and the largest is 34.

ICET - Integrated Common Entrance Test Practice Test