What will come in the place of '?' in the following equation, if '+' and '-' are interchanged and '×' and '÷' are interchanged?
90 × 2 - 43 + 7 ÷ 7 = ?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 39.
90 × 2 - 43 + 7 ÷ 7 = ?
After interchanging signs,
= (90 ÷ 2) + 43 - (7 × 7)
= (45 + 43) - 49
= 88 - 49
= 39