Select the number that will come in the place of the question mark(?), if ‘+’ and ‘ – ‘ are interchanged and ‘×’ and ‘÷’ are interchanged.
11 ÷ 12 – 78 × 6 + 57 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 88.
Given equation: 11 ÷ 12 – 78 × 6 + 57 = ?
if ‘+’ and ‘ – ‘ are interchanged and ‘×’ and ‘÷’ are interchanged
11 × 12 + 78 ÷ 6 – 57 = ?
? = 11 × 12 + 13 – 57
? = 132 + 13 – 57
? = 145 – 57 = ? = 88