Which two numbers should be interchanged to make the given equation correct?
45 ÷ 3 + 12 × 9 – 15 + 2 × 5 = 36
(NOTE: Numbers must be interchanged and not the constituent digits e.g. if 2 and 3 are to be interchanged in the equation 43 × 3 + 4 ÷ 2, then interchanged equation is 43 × 2 + 4 ÷ 3
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 3 and 9.
45 ÷ 3 + 12 × 9 – 15 + 2 × 5 = 36
After interchanging numbers,
(45 ÷ 9) + 12 × 3 - 15 + 2 × 5 = 36
5 + 36 - 15 + 10 = 36
36 = 36.