Question : Directions: Which two numbers should be interchanged in the following equation to make it correct? 24 ÷ 3 + 11 × 6 – 18 = 19
Option 1: 24 and 18
Option 2: 11 and 3
Option 3: 3 and 6
Option 4: 3 and 18
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Correct Answer: 3 and 6
Solution : Given: 24 ÷ 3 + 11 × 6 – 18 = 19
Replace the given numbers in the options one by one with the original symbols in the given equation. First option: 24 and 18 = 18 ÷ 3 + 11 × 6 – 24 = 6 + 66 – 24 = 48 ≠ 19 Second option: 11 and 3 = 24 ÷ 11 + 3 × 6 – 18 = 2.18 + 18 – 18 = 2.18 ≠ 19 Third option: 3 and 6 = 24 ÷ 6 + 11 × 3 – 18 = 4 + 33 – 18 = 37 – 18 = 19 Fourth option: 3 and 18 = 24 ÷ 18 + 11 × 6 – 3 = 1.34 + 66 – 3 = 64.34 ≠ 19
Here, only the third option satisfies the R.H.S. of the given equation. Hence, the third option is correct.
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