What will come in the place of the question mark (?) in the following equation if '+' and '-' are interchanged and '×' and '÷' are interchanged?
42 × 7 ÷ 12 - 77 + 13 = ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 136.
Given series: 42 × 7 ÷ 12 - 77 + 13 = ?
After interchanging the signs;
(42 ÷ 7) × 12 + 77 - 13 = ?
= (6 × 12) + 77 - 13
= (72 + 77) - 13
= 149 - 13
= 136