Just by looking at the following no. Give reason they are not perfect square 1. 89138
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Property of perfect square : A number having 2, 3, 7 or 8 at unit's place is never a perfect square
it is not perfect square because in the last of (89138) 8 is coming and as we know, in any no.'s square at last 8 is not possible.
hence,it is not an perfect square.
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