Posted by simthandile on Monday, February 4, 2013 at 2:20pm.
a number ending in 0 when squared ends in 0
a number ending in 1 when squared ends in 1
a number ending in 2 when squared ends in 4
a number ending in 3 when squared ends in 9
...
a number ending in 9 when squared ends in 1
investigate.
http://www.mathwarehouse.com/arithmetic/numbers/list-of-perfect-squares.php
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