2. Is 7928 and 1057 are perfect squares? Give reason for your answer.
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Answer:
No
There is a easy trick to check whether the no. is perfect square or not. Just look at its unit/ones digit. The no. have 8 and 7 at unit place,so they are not perfect square.
Perfect square have 1,4,5,6,9,0 at their unit place..
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