What will come in the place of the question mark (?) in the following equation if ‘−’ and ‘+’ are interchanged and ‘÷’ and ‘×’ are interchanged?
13 ÷ 4 + 16 × 2 − 21 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 65.
Given equation: 13 ÷ 4 + 16 × 2 − 21 = ?
On interchanging the signs:
13 × 4 - 16 ÷ 2 + 21 = ?
? = 52 - 8 + 21
? = 73 - 8 = 65