IMO Arithmetic and Operations

Question 1

What is 256 ÷ 16?

Accepted Answer

16

Answer

256 ÷ 16 = 16.

Question 2

Which of the following is the correct order of operations for 3 + 4 × 2?

Accepted Answer

11

Answer

By BODMAS/PEMDAS, multiplication comes before addition: 4 × 2 = 8, then 3 + 8 = 11.

Question 3

What is 15% of 200?

Accepted Answer

30

Answer

15% of 200 = (15/100) × 200 = 30.

Question 4

A shopkeeper bought goods for $450 and sold them for $540. What is the profit percentage?

Accepted Answer

20%

Answer

Profit = $90; Profit % = (90/450) × 100 = 20%.

Question 5

What is the value of (48 + 32) ÷ (5 × 4)?

Accepted Answer

4

Answer

(48 + 32) ÷ (5 × 4) = 80 ÷ 20 = 4.

IMO - International Mathematics Olympiad Practice Test