What will come in the place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
30 − 10 ÷ 63 × 9 + 15 =?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 25.
Given equation: 30 − 10 ÷ 63 × 9 + 15 =?
On interchanging the signs:
30 + 10 × 63 ÷ 9 − 15 =?
? = 30 + 70 - 15
? = 100 - 15 = 85