Which of the mathematical signs should be interchanged in the below equation to make it mathematically correct?
15 ÷ 5 × 27 + 3 − 9 = 51
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. ÷ and +.
Given equation: 15 ÷ 5 × 27 + 3 − 9 = 51
Option 1: ÷ and +
After interchanging the expression becomes:
= 15 + 5 × 27 ÷ 3 − 9 = 51
= 15 + 5 × 9 − 9
= 15 + 45 − 9
= 60 - 9
= 51 is equal to 51
As we have found our answer, there is no need to check further options.
Hence, ÷ and + is the correct answer.