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Write down the sum of sum of sum of digits of $4444^{4444}$
If we write $ 4444^{4444}$ in decimal form .Then the sum of digits is equal to :$A$ .If we assume that: $B$ is the sum of digits :$A$ .How to find the sum of digits :$B$
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http://mathcentral.uregina.ca/QQ/database/QQ.09.08/h/shivdeep1.html – lab bhattacharjee Jan 07 '13 at 16:44
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http://math.stackexchange.com/questions/169857/what-is-the-sum-of-sum-of-digits-of-444444444444 – lab bhattacharjee Jan 07 '13 at 16:45
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Also http://math.stackexchange.com/questions/169797/write-down-the-sum-of-sum-of-sum-of-digits-of-44444444?lq=1 – Bart Michels Jan 07 '13 at 17:02