Which two signs should be interchanged to make the equation mathematically correct?
25 + 8 ÷ 40 - 20 × 25 = 10
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. + and ×.
Given equation: 25 + 8 ÷ 40 - 20 × 25 = 10
Option 1: + and ×
After interchanging the expression becomes:
⇒ {25 × (8 ÷ 40)} - 20 + 25 = 10
⇒ 5 - 20 + 25 = 10
⇒ 30 - 20 = 10
⇒ 10 = 10
As we have found our answer, there is no need to check further options.
Hence, the correct answer is + and ×.