Which of the mathematical signs should be interchanged in the below equation to make it mathematically correct?
12 + 112 ÷ 16 - 8 × 64 = 140
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. + and ×.
Given equation: 12 + 112 ÷ 16 - 8 × 64 = 140
Option 1: + and -
After interchanging the expression becomes:
= 12 - 112 ÷ 16 + 8 × 64 = 140
= 12 - 7 + 8 × 64
= 12 - 7 + 512
= 517 is not equal to 140
Option 2: + and ×
After interchanging the expression becomes:
= 12 × 112 ÷ 16 - 8 + 64 = 140
= 12 × 7 - 8 + 64
= 84 - 8 + 64
= 140 = 140
As we have found our answer, there is no need to check further options.
Hence, + and × is the correct answer.