If a number has 1or 9 in the unit place then it's square ends in - 1, If a number has 2 or 8 in the unit place then it's square ends in - 4, If a number has 3 or 7 in the unit place then it's square ends in - 9, If a number has 4 or 6 in the unit place then it's square ends in - 6, If a number has 5 in the unit place then it's square ends in - 5, If a number has 0 in the unit place then it's square ends - 0, square of an odd number is always - odd number, square of an even number is always - even,

Properties of square numbers

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