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Q: Which two number should be interchanged to make the following equation correct? 16 × 1792 ÷ 7 + 9 – 15 = 778
  • A. 16, 15
  • B. 16, 9
  • C. 15, 9
  • D. 16, 7
Correct Answer: Option D - According to option (d), On interchanging 16 and 7 in the equation 16 × 1792 ÷ 7 + 9 – 15 = 778 7 × 1792 ÷ 16 + 9 – 15 = 778 7 × 112 + 9 – 15 = 778 784 + 9 – 15 = 778 793 – 15 = 778 778 = 778 L.H.S = R.H.S
D. According to option (d), On interchanging 16 and 7 in the equation 16 × 1792 ÷ 7 + 9 – 15 = 778 7 × 1792 ÷ 16 + 9 – 15 = 778 7 × 112 + 9 – 15 = 778 784 + 9 – 15 = 778 793 – 15 = 778 778 = 778 L.H.S = R.H.S

Explanations:

According to option (d), On interchanging 16 and 7 in the equation 16 × 1792 ÷ 7 + 9 – 15 = 778 7 × 1792 ÷ 16 + 9 – 15 = 778 7 × 112 + 9 – 15 = 778 784 + 9 – 15 = 778 793 – 15 = 778 778 = 778 L.H.S = R.H.S