Which digit will be in unit place of a number so that the number will not be a perfect square?
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If unit digit of a perfect square is 0 then ten's digit has to be 0. E.g. 100,400,900 all are Perfect Square having unit digit 0 and tens digit is 0. – If a number ends with 2, 3, 7 or 8 then it can't be perfect square. 88 we get 7744.
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– If unit digit of a perfect square is 0 then ten's digit has to be 0. E.g. 100,400,900 all are Perfect Square having unit digit 0 and tens digit is 0. – If a number ends with 2, 3, 7 or 8 then it can't be perfect square. 88 we get 7744.
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