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Q: Which two numbers should be interchanged to make the given equation correct? (176 ÷ 4) + (22 × 8) – (2 × 20) = 70 (Note : Interchange should be done of entire number and not individual digits of a given number)
  • A. 22 and 20
  • B. 2 and 8
  • C. 4 and 8
  • D. 2 and 4
Correct Answer: Option C - Given equation (176 ÷ 4) + (22 × 8) – (2 × 20) = 70 On interchanging the number 4 and 8 as per option (c), (176 ÷ 8) + (22 × 4) – (2 × 20) = 70 22 + 88 – 40 = 70 110 – 40 = 70 70 = 70 L.H.S. = R.H.S.
C. Given equation (176 ÷ 4) + (22 × 8) – (2 × 20) = 70 On interchanging the number 4 and 8 as per option (c), (176 ÷ 8) + (22 × 4) – (2 × 20) = 70 22 + 88 – 40 = 70 110 – 40 = 70 70 = 70 L.H.S. = R.H.S.

Explanations:

Given equation (176 ÷ 4) + (22 × 8) – (2 × 20) = 70 On interchanging the number 4 and 8 as per option (c), (176 ÷ 8) + (22 × 4) – (2 × 20) = 70 22 + 88 – 40 = 70 110 – 40 = 70 70 = 70 L.H.S. = R.H.S.