Which two numbers and two signs should be interchanged in the following equation to make it correct?
18 - 6 + 11 × 5 + 18 = 113
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 6 and 5, - and ×.
Given equation: 18 - 6 + 11 × 5 + 18 = 113
Option 1: 6 and 5, - and ×
After interchanging the expression becomes:
= 18 × 5 + 11 - 6 + 18 = 113
= 90 + 11 - 6 + 18
= 119 - 6
= 113 is equal to 113.
As we have found our answer, there is no need to check further options.
Hence, Option 1 is the correct answer.