Question : Directions: Which two numbers should be interchanged, to make the given equation correct? 4 × 8 – 12 + 5 = 16
Option 1: 4 and 5
Option 2: 8 and 5
Option 3: 16 and 8
Option 4: 12 and 16
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Correct Answer: 8 and 5
Solution : Given: 4 × 8 – 12 + 5 = 16
Replace the given numbers in the options one by one with the original numbers in the given equation. First option: 4 and 5 4 × 8 – 12 + 5 = 16 = 5 × 8 – 12 + 4 = 16 = 40 – 12 + 4 = 32 ≠ 16 Second option: 8 and 5 4 × 8 – 12 + 5 = 16 = 4 × 5 – 12 + 8 = 16 = 20 – 12 + 8 = 16 Third option: 16 and 8 4 × 8 – 12 + 5 = 16 = 4 × 16 – 12 + 5 = 8 = 64 – 12 + 5 = 57 ≠ 8 Fourth option: 12 and 16 4 × 8 – 12 + 5 = 16 = 4 × 8 – 16 + 5 = 12 = 32 – 16 + 5 = 21 ≠ 12
So, only the second option satisfies the condition. Hence, the second option is correct.
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