Question : Directions: After interchanging ÷ and ×, 10 and 5, which one of the following becomes a correct equation?
Option 1: (30 ÷ 5) × 10 = 24
Option 2: (30 × 10) ÷ 5 = 60
Option 3: (30 ÷ 10) × 5 = 18
Option 4: (10 ÷ 30) × 5 = 70
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Correct Answer: (30 × 10) ÷ 5 = 60
Solution : Interchange ÷ and ×, 10 and 5 in the given options one by one. First option: (30 ÷ 5) × 10 = 24 = (30 × 10) ÷ 5 = 300 ÷ 5 = 60 ≠ 24 Second option: (30 × 10) ÷ 5 = 60 = (30 ÷ 5) × 10 = 6 × 10 = 60 Third option: (30 ÷ 10) × 5 = 18 = (30 × 5) ÷ 10 = 150 ÷ 10 = 15 ≠ 18 Fourth option: (10 ÷ 30) × 5 = 70 = (5 × 30) ÷ 10 = 150 ÷ 10 = 15 ≠ 70
Here, only the second option satisfies the R.H.S. of the given equation. Hence, the second option is correct.
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