Which number will come in the place of the question mark (?) in the following equation if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged?
49 × 7 − 6 ÷ 2 + 15 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 4.
Given equation: 49 × 7 − 6 ÷ 2 + 15 = ?
If ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged, then
49 ÷ 7 + 6 × 2 - 15 = ?
⇒ 7 + 6 × 2 - 15
⇒ 7 + 12 - 15
⇒ 19 - 15 = 4