Question : Directions: In the following question, select the one that is different from the other three alternatives.
Option 1: (25, 49)
Option 2: (121, 169)
Option 3: (7, 169)
Option 4: (9, 25)
Correct Answer: (7, 169)
Solution :
Let's check the given options –
First option:
(25, 49); 25 = 5
2
and 49 = 7
2
Second option:
(121, 169); 121 = 11
2
and 169 = 13
2
Third option:
(7, 169); 169 = 7 is not a perfect square and 169 = 13
2
Fourth option:
(9, 25); 9 = 3
2
and 25 = 5
2
So, the third option is different from the other three options as here 7 is not a perfect square. Hence, the third option is correct.
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