Question : Direction: In the following question, select the one which is different from other three alternatives.
Option 1: 34 - 30
Option 2: 44 - 31
Option 3: 61 - 12
Option 4: 25 - 21
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Correct Answer: 44 - 31
Solution : Let's check the options —
First option: 34 - 30; 34 – 30 = 4; 4 is a perfect square.
Second option: 44 - 31; 44 – 31 = 13; 13 is not a perfect square. This option is different from the other options.
Third option: 61 - 12; 61 – 12 = 49; 49 is a perfect square.
Fourth option: 25 - 21; 25 – 21 = 4; 4 is a perfect square.
Hence, second option is correct.
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