What will come in the place of the question mark ‘(?)’ in the following equation, if ‘÷’ and ‘×’ are interchanged and ‘+’ and ‘−’ are interchanged?
40 − 8 ÷ 1 + 72 × 8 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 39.
Given equation: 40 − 8 ÷ 1 + 72 × 8 = ?
After interchanging the sign:
40 + 8 × 1 - 72 ÷ 8 = ?
? = 40 + 8 - 9
? = 48 - 9 = 39