Answers

2014-08-30T11:05:52+08:00
-Find it's digital root , if the digital root is 1,4,7,or 9 it is a square
to find the digital root ,  add all of it's digits
-if the number ends with 5, and the tens digit is 2
-it ends with 1,4,5,6,9 or 00 (even number of zeroes )(ex. 00,0000,000000)
that's all i know po :)





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