Select the number that will come in the place of the question mark(?), if ‘+’ and ‘ – ‘ are interchanged and ‘×’ and ‘÷’ are interchanged.
31 ÷ 3 – 186 × 6 + 17 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 107.
Given equation: 31 ÷ 3 – 186 × 6 + 17 = ?
Now, ‘+’ and ‘–‘ and ‘×’ and ‘÷’ are interchanged, then:
⇒ 31 × 3 + (186 ÷ 6) – 17 = ?
⇒ (31 × 3) + 31 – 17 = ?
⇒ (93 + 31) – 17 = ?
⇒ 124 – 17 = 107