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Mathematics 12 Online
OpenStudy (anonymous):

​ if the positive integer N is perfect square then its digital root is 1,4,7,9

OpenStudy (anonymous):

@ganeshie8 im still working on this proof xD but i note something u cant make it a test for perfect square

ganeshie8 (ganeshie8):

yeah its only a necessary condition, not a sufficient condition

OpenStudy (anonymous):

ahaa so was thinking lol i need a research for it :O

ganeshie8 (ganeshie8):

??

OpenStudy (anonymous):

??

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