Which of the following interchanges of numbers and mathematical signs would make the given equation correct?
729 × 81 ÷ 20 + 16 − 6 = 50
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 6 and 20, × and ÷.
Given equation: 729 × 81 ÷ 20 + 16 − 6 = 50
Option 1: 6 and 20, × and ÷
After interchanging the expression becomes:
729 ÷ 81 × 6 + 16 − 20 = 50
9 × 6 + 16 − 20 = 50
54 + 16 − 20 = 50
70 - 20 = 50
50 = 50