Which two signs should be interchanged to make the equation mathematically correct?
24 + 36 × 32 − 8 ÷ 20 = 148
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. ÷ and −.
Given equation: 24 + 36 × 32 − 8 ÷ 20 = 148
Option 1: + and ÷
After interchanging the expression becomes:
= 24 ÷ 36 × 32 − 8 + 20 = 148
= 33.33 is not equal to 148.
Option 2: ÷ and −
After interchanging the expression becomes:
= 24 + 36 × 32 ÷ 8 - 20 = 148
= 24 + 36 × 4 - 20
= 24 + 144 - 20
= 168 - 20
= 148 = 148
As we have found our answer, there is no need to check further options.
Hence, ÷ and − is the correct answer.