What will come in the place of the question mark (‘?’) in the following equation, if ‘+’ and ‘×’ are interchanged and ‘÷′ and ‘–‘ are interchanged?
18 × 72 – 3 ÷ 2 + 11 = ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 20.
Given equation: 18 × 72 – 3 ÷ 2 + 11 = ?
On interchanging the signs:
18 + 72 ÷ 3 - 2 × 11 = ?
? = 18 + 24 - 22
? = 42 - 22 = 20