What will come in the place of the question mark ‘(?)’ in the following equation, if ‘÷’ and ‘×’ are interchanged and ‘+’ and ‘−’ are interchanged?
31 − 5 ÷ 7 + 27 × 9 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 63.
Given equation: 31 − 5 ÷ 7 + 27 × 9 = ?
On interchanging the signs:
31 + 5 × 7 - 27 ÷ 9 = ?
? = 31 + 35 - 3
? = 66 - 3 = 63