Which two signs should be interchanged to make the equation given below mathematically correct?
63 + 5 ÷ 35 - 7 × 21 = 23
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. × and +
Given equation: 63 + 5 ÷ 35 - 7 × 21 = 23
Option 1: × and +
After interchanging the expression becomes:
= 63 × 5 ÷ 35 - 7 + 21 = 23
= 9 - 7 + 21
= 9 + 14
= 23 is equal to 23.
As we have found our answer, there is no need to check further options.
Hence, × and + is the correct answer.