What will come in the place of (?) in the following equation, if '+' and '-' are interchanged and '×' and '÷' are interchanged?
89 ÷ 7 - 42 × 7 + 5 = ?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 624.
Given equation: 89 ÷ 7 - 42 × 7 + 5 = ?
After interchanging signs equation becomes;
= 89 × 7 + (42 ÷ 7) - 5
= (89 × 7) + 6 - 5
= (623 + 6) - 5
= 629 - 5
= 624