### Possible Answer

My view on square numbers. ... the ones place is given only by a², and these are 0, 1, 4, 9 or the last digits of 16, ... Then 132 and 138 come into consideration. - read more

Jul 29, 2010 ... This page teaches how to mentally square numbers in your head. ... 4, 16. 5, 25. 6, 36. 7, 49. 8, 64. 9, 81. 10, 100. 11, 121. 12, 144. 13, 169. 14, 196 ... Squaring Numbers 1 Greater Than Numbers With Known Squares. - read more

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