Answers

2015-05-18T14:30:21+05:30
15^n gives you (3*5)^n
if at all it ends with 0, it should have atleast 2 as one of its prime factors (as 5*2=10) so 15^n can't end with 0 for any natural no n.
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2015-05-21T19:31:34+05:30
the natural number is not end with 0.
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