Which two signs should be interchanged to make the following equation correct?
13 × 2 − (8 ÷ 4) + (4 × 1) = 24
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. + and –.
Given equation: 13 × 2 − (8 ÷ 4) + (4 × 1) = 24
Option 1: + and ÷
After interchanging the expression becomes:
= 13 × 2 − (8 + 4) ÷ (4 × 1) = 24
= 13 × 2 − 12 ÷ 4
= 13 × 2 − 3
= 23 is not equal to 24.
Option 2: + and –
After interchanging the expression becomes:
= 13 × 2 + (8 ÷ 4) - (4 × 1) = 24
= 13 × 2 + 2 - 4
= 26 + 2 - 4
= 24 is equal to 24.
As we have found our answer, there is no need to check further options.
Hence, option 2 is the correct answer.