Question : Directions: In the following equation, two signs and two numbers need to be interchanged to make it correct. Select the appropriate signs and numbers from the given alternatives. 6 × 8 + 2 = 20
Option 1: × and +, 6 and 2
Option 2: + and ×, 6 and 8
Option 3: + and ×, 2 and 8
Option 4: × and +, 2 and 6
Correct Answer: + and ×, 6 and 8
Solution : Given: 6 × 8 + 2 = 20
Replace the given symbols and numbers in the options one by one with the original symbols and numbers in the given equation. First option: × and +, 6 and 2 = 2 + 8 × 6 = 2 + 48 = 50 ≠ 20 Second option: + and ×, 6 and 8 = 8 + 6 × 2 = 8 + 12 = 20 Third option: + and ×, 2 and 8 = 6 + 2 × 8 = 6 + 16 = 22 ≠ 20 Fourth option: × and +, 2 and 6 = 2 + 8 × 6 = 2 + 48 = 50 ≠ 20
Here, only the second option satisfies the R.H.S. of the given equation. Hence, the second option is correct.
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