What will come in the place of the question mark ‘(?)’ in the following equation, if ‘−’ and ‘÷’ are interchanged and ‘×’ and ‘+’ are interchanged?
8 + 63 − 7 × 7 ÷ 9 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4, i.e., 70.
After interchanging signs,
= 8 × (63 ÷ 7) + 7 - 9
= 8 × 9 + 7 - 9
= 72 + 7 - 9
= 79 - 9
= 70