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Q: Which two numbers should be interchanged to make the given equation correct? 42 ÷ 7 × 5 + 35 – 49 = 18
  • A. 42 and 49
  • B. 35 and 49
  • C. 5 and 35
  • D. 42 and 35
Correct Answer: Option D - given 42 ÷ 7 × 5 + 35 – 49 = 18 from option (d), on interchange the number 42 and 35. 35 ÷ 7 × 5 + 42 – 49 = 18 25 + 42 – 49 = 18 67 – 49 = 18 18 = 18 L.H.S. = R.H.S. Hence, option (b) will be correct.
D. given 42 ÷ 7 × 5 + 35 – 49 = 18 from option (d), on interchange the number 42 and 35. 35 ÷ 7 × 5 + 42 – 49 = 18 25 + 42 – 49 = 18 67 – 49 = 18 18 = 18 L.H.S. = R.H.S. Hence, option (b) will be correct.

Explanations:

given 42 ÷ 7 × 5 + 35 – 49 = 18 from option (d), on interchange the number 42 and 35. 35 ÷ 7 × 5 + 42 – 49 = 18 25 + 42 – 49 = 18 67 – 49 = 18 18 = 18 L.H.S. = R.H.S. Hence, option (b) will be correct.