Which two numbers should be interchanged to make the following equation mathematically correct?

16 ÷ 4 × 5 + 3 − 2 = 15

Correct option is B

Ans. (b) 5, 3

Sol. Let's try interchanging 5 and 3. The new equation becomes:

16 ÷ 4 × 3 + 5 − 2

Apply BODMAS:

1. 16 ÷ 4 = 4

2. 4 × 3 = 12

3. 12 + 5 = 17

4. 17 − 2 = 15

The equation is correct after interchanging 5 and 3.