Question : Directions: In the following question, select the one that is different from the other three alternatives.
Option 1: 3 – 9
Option 2: 5 – 25
Option 3: 7 – 49
Option 4: 8 – 64
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Correct Answer: 8 – 64
Solution : Let's check the options – First option: 3 – 9; 9 is a perfect square of 3. Second option: 5 – 25; 25 is a perfect square of 5. Third option: 7 – 49; 49 is a perfect square of 7. Fourth option: 8 – 64; 64 is a perfect square of 8 and also a perfect cube of 4.
So, the fourth option is different from the other three options as 64 is a perfect square and a perfect cube. Hence, the fourth option is correct.
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Question : Directions: In the following question, select the one which is different from the other three alternatives.
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