- If a square number ends in ‘9’, its square root is a number ending in’3’ or ‘7’.
- If a square number ends in ‘1’, its square root is a number ending in’1’ or ‘9’.
- If a square number ends in ‘5’, its square root is a number ending in’5’
- If a square number ends in ‘4’, its square root is a number ending in’2’ or ‘8’.
- If a square number ends in ‘6’, its square root is a number ending in’4’ or ‘6’.
- If a square number ends in ‘0’, its square root is a number ending in ‘0’.

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TopNewestGood observations. Do you know why this is true?

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