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Results tagged with digits
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user 7691
16
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Accepted
Density of the set of numbers whose sum of digits is prime
To see this, first let $n=10^k$ and note that for $X$ chosen uniformly among integers in $[0,n-1]$, the sum $S(X)$ of base 10 digits is the sum of $k$ i.i.d. random variables uniformly distributed among …
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