What will come in the place of the question mark (?) in the following equation if ‘+’ and ‘–’ are interchanged and ‘×’and ‘÷’ are interchanged?
163 ÷ 3 + 147 × 7 – 1 = ?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 469.
163 ÷ 3 + 147 × 7 – 1 = ?
After interchanging signs,
= 163 × 3 - (147 ÷ 7) + 1
= 163 × 3 - 21 + 1
= 489 - 21 +1
= 490 - 21
= 469