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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
199093 changed files with 3378972 additions and 0 deletions
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3
Task/Casting-out-nines/Mathematica/casting-out-nines-1.math Normal file
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Co9[n_, b_: 10] :=
With[{ans = FixedPoint[Total@IntegerDigits[#, b] &, n]},
If[ans == b - 1, 0, ans]];

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Task/Casting-out-nines/Mathematica/casting-out-nines-2.math Normal file
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Co9 /@ (vals = {1235, 2345, 4753})
{2, 5, 1}
Total[Co9 /@ vals] == Co9[Total[vals]]
True

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Task/Casting-out-nines/Mathematica/casting-out-nines-3.math Normal file
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task2 = Select[Range@100, Co9[#] == Co9[#^2] &]

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Task/Casting-out-nines/Mathematica/casting-out-nines-4.math Normal file
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Co9eff[n_, b_: 10] := Mod[n, b - 1];

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Task/Casting-out-nines/Mathematica/casting-out-nines-5.math Normal file
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task2 == Select[Range@100, Co9eff[#] == Co9eff[#^2] &]
True
Select[Range@100, Co9eff[#, 17] == Co9eff[#^2, 17] &]
{1, 16, 17, 32, 33, 48, 49, 64, 65, 80, 81, 96, 97}