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Q: Which two numbers should be interchanged to make the given equation correct? 9 + 7 × 5 – 18 ÷ 2 = 3 × 4 – 10 + 45 ÷ 5
  • A. 18 and 45
  • B. 7 and 4
  • C. 2 and 5
  • D. 9 and 3
Correct Answer: Option B - Given, 9 + 7 × 5 – 18 ÷ 2 = 3 × 4 – 10 + 45 ÷ 5 On interchanging 7 and 4 from option (b)- 9 + 4 × 5 – 18 ÷ 2 = 3 × 7 – 10 + 45 ÷ 5 9 + 20 – 9 = 21 – 10 + 9 20 = 20
B. Given, 9 + 7 × 5 – 18 ÷ 2 = 3 × 4 – 10 + 45 ÷ 5 On interchanging 7 and 4 from option (b)- 9 + 4 × 5 – 18 ÷ 2 = 3 × 7 – 10 + 45 ÷ 5 9 + 20 – 9 = 21 – 10 + 9 20 = 20

Explanations:

Given, 9 + 7 × 5 – 18 ÷ 2 = 3 × 4 – 10 + 45 ÷ 5 On interchanging 7 and 4 from option (b)- 9 + 4 × 5 – 18 ÷ 2 = 3 × 7 – 10 + 45 ÷ 5 9 + 20 – 9 = 21 – 10 + 9 20 = 20