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Question Number 19646 by Tinkutara last updated on 13/Aug/17
Find the sum of all possible digits that  comes at ten′s place for 3^n  where n is  any natural number.
$$\mathrm{Find}\:\mathrm{the}\:\mathrm{sum}\:\mathrm{of}\:\mathrm{all}\:\mathrm{possible}\:\mathrm{digits}\:\mathrm{that} \\ $$$$\mathrm{comes}\:\mathrm{at}\:\mathrm{ten}'\mathrm{s}\:\mathrm{place}\:\mathrm{for}\:\mathrm{3}^{{n}} \:\mathrm{where}\:{n}\:\mathrm{is} \\ $$$$\mathrm{any}\:\mathrm{natural}\:\mathrm{number}. \\ $$
Commented by Tinkutara last updated on 16/Aug/17
help pls
$$\mathrm{help}\:\mathrm{pls} \\ $$

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