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प्रश्न
By just examining the units digit, can you tell which of the following cannot be whole square?
1026
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उत्तर
If the units digit of a number is 2, 3, 7 or 8, the number cannot be a whole square.
1026 has 6 as the units digit, so it is possibly a perfect square.
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_______ is added to 242 to get 252
