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Q: If '+' and '–' are interchanged and '×' and ‘÷’ are interchanged, then what will come in place of question mark (?) in the following equation? 163 ÷ 3 + 147 × 7 – 1 = ?
  • A. 469
  • B. 479
  • C. 459
  • D. 489
Correct Answer: Option A - 163 ÷ 3 + 147 × 7 – 1 = ? Interchanging the sine ('+' and '–') and ('×' and '÷') , 163 × 3 – 147 ÷ 7 + 1 = ? 163 × 3 – 21 + 1 = ? 489 – 21 + 1 = ? 490 – 21 = ? ? = 469
A. 163 ÷ 3 + 147 × 7 – 1 = ? Interchanging the sine ('+' and '–') and ('×' and '÷') , 163 × 3 – 147 ÷ 7 + 1 = ? 163 × 3 – 21 + 1 = ? 489 – 21 + 1 = ? 490 – 21 = ? ? = 469

Explanations:

163 ÷ 3 + 147 × 7 – 1 = ? Interchanging the sine ('+' and '–') and ('×' and '÷') , 163 × 3 – 147 ÷ 7 + 1 = ? 163 × 3 – 21 + 1 = ? 489 – 21 + 1 = ? 490 – 21 = ? ? = 469