What will come in place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
63 × 9 + 21 – 4 ÷ 5 = ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 6.
Given equation: 63 × 9 + 21 – 4 ÷ 5 = ?
When ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged
⇒ 63 ÷ 9 - 21 + 4 × 5 = ?
⇒ 7 - 21 + 4 × 5 = ?
⇒ 7 - 21 + 20 = ?
⇒ 27 - 21 = 6