If ‘+’ means ‘−’, ‘−’ means ‘×’, ‘×’ means ‘÷’ and ‘÷’ means ‘+’, what will come in place of ‘?’ in the following equation?
79 ÷ 64 × 8 −7 + 12 =?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 123.
Given conditions: ‘+’ means ‘−’, ‘−’ means ‘×’, ‘×’ means ‘÷’ and ‘÷’ means ‘+’
Given equation: 79 ÷ 64 × 8 −7 + 12 =?
After interchanging the expression becomes:
= 79 + 64 ÷ 8 × 7 − 12
= 79 + 8 × 7 − 12
= 79 + 56 − 12
= 135 - 12 = 123