What will come in place of the question mark (?) of the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?
15 + 9 ÷ 2 – 63 × 3 = ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 18.
Given equation: 15 + 9 ÷ 2 – 63 × 3 = ?
On interchanging the sign:
15 - 9 × 2 + 63 ÷ 3 = ?
? = 15 - 18 + 21
? = 36 - 18 = 18