What will come in the place of ‘?’ in the following equation, if ‘× ’ and ‘-‘ are interchanged and also ‘+’ and ‘÷ ’ are interchanged?
40 + 10 − 5 × 4 ÷ 5 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 21.
Given equation: 40 + 10 − 5 × 4 ÷ 5 =?
After interchanging the expression becomes:
= 40 ÷ 10 × 5 - 4 + 5
= 4 × 5 - 4 + 5
= 20 - 4 + 5 = 21