What will come in place of ‘?’ in the following equation, if ‘+’ and ‘–‘ are interchanged and ‘×’ and ‘÷’ are interchanged?
163 ÷ 5 + 147 × 7 − 19 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 813.
163 ÷ 5 + 147 × 7 − 19 = ?
After interchanging signs,
= 163 × 5 - (147 ÷ 7) + 19
= 163 × 5 - 21 + 19
= 815 - 21 + 19
= 834 - 21
= 813