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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