What will come in the place of the question mark (?) in the following equation, if '+' and '-' are interchanged and '×' and '÷' are interchanged?
91 × 7 + 27 - 7 ÷ 13 =?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 77.
Given conditions: '+' and '-' are interchanged and '×' and '÷' are interchanged
Given equation: 91 × 7 + 27 - 7 ÷ 13 =?
After interchanging the expression becomes:
= 91 ÷ 7 - 27 + 7 × 13
= 13 - 27 + 7 × 13
= 13 - 27 + 91
= 104 - 27
= 77
Hence, 77 is the correct answer.