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Q: If '+' and '–' are interchanged and '×' and '÷' are interchanged, then what will come in place of the question mark (?) in the following equation? 89 ÷ 7 – 42 × 7 + 5 = ?
  • A. 246
  • B. 624
  • C. 426
  • D. 264
Correct Answer: Option B - 89 ÷ 7 – 42 × 7 + 5 = ? As per question on interchanging the sings - = 89 × 7 + 42 ÷ 7 – 5 = 89 × 7 + 6 – 5 = 623 + 1 = 624
B. 89 ÷ 7 – 42 × 7 + 5 = ? As per question on interchanging the sings - = 89 × 7 + 42 ÷ 7 – 5 = 89 × 7 + 6 – 5 = 623 + 1 = 624

Explanations:

89 ÷ 7 – 42 × 7 + 5 = ? As per question on interchanging the sings - = 89 × 7 + 42 ÷ 7 – 5 = 89 × 7 + 6 – 5 = 623 + 1 = 624