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Q: Which two signs should be interchanged to make the given equation correct? 28 + 14 × 7 ÷ 5 – 18 = 20
  • A. ÷ and +
  • B. ÷ and –
  • C. + and ×
  • D. ÷ and ×
Correct Answer: Option D - From option (d), On interchanging the signs ÷ and × – 28 + 14 × 7 ÷ 5 – 18 = 20 28 + 14 ÷ 7 × 5 – 18 = 20 28 + 2 × 5 – 18 = 20 38 – 18 = 20 20 = 20 (L.H.S = R.H.S) Hence option (d) is correct answer.
D. From option (d), On interchanging the signs ÷ and × – 28 + 14 × 7 ÷ 5 – 18 = 20 28 + 14 ÷ 7 × 5 – 18 = 20 28 + 2 × 5 – 18 = 20 38 – 18 = 20 20 = 20 (L.H.S = R.H.S) Hence option (d) is correct answer.

Explanations:

From option (d), On interchanging the signs ÷ and × – 28 + 14 × 7 ÷ 5 – 18 = 20 28 + 14 ÷ 7 × 5 – 18 = 20 28 + 2 × 5 – 18 = 20 38 – 18 = 20 20 = 20 (L.H.S = R.H.S) Hence option (d) is correct answer.