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Digit sums, of any value?
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2021-02-20, 09:39
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retina
Undefined
"The unspeakable one"
Jun 2006
My evil lair
2
^{2}
×3
^{2}
×5
^{2}
×7 Posts
And the digit sum of 10 is 1.
BTW: Repeated digit sum is just another way of computing the remainder when divided by 9.
Or more succinctly: digit_sum
^{n}
(x) = x mod 9
retina
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