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Question
If A, B, C, ..., X, Y, Z represents digits, which of the following could be a perfect square?
Options:
A .  XX1
B .  ABC2
C .  PQR7
D .  Can't be said without actual calculation
Answer: Option A
:
A
The numbers 7, 2 and 3 do not appear in the unit place ofany perfect square. So, ABC2 and PQR7 can not be perfect squares and XX1 is the only number which could be a perfect square.

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