Select the number that will come in the place of the question mark(?), if ‘+’ and ‘-' are interchanged and ‘×’ and ‘÷’ are interchanged
63 × 7 ÷ 13 - 64 + 42 = ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 139.
Given equation: 63 × 7 ÷ 13 - 64 + 42 = ?
On interchanging the signs:
(63 ÷ 7) × 13 + 64 - 42 = ?
? = (9 × 13) + 64 - 42
? = (117 + 64) - 42
? = 139