Which number will come in the place of the question mark (?) in the following equation if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?
27 × 3 + 4 ÷ 2 − 7 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 8.
Given equation: 27 × 3 + 4 ÷ 2 − 7 = ?
On interchanging the signs:
(27 ÷ 3) - 4 × 2 + 7 = ?
? = 9 - (4 × 2) + 7
? = 9 - 8 + 7
= 16 - 8 = 8