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A competition to solve a particular problem through the usage and manipulation of numbers.
1
vote
Number letter counts
Mathematica, 38 bytes
StringLength@StringJoin@IntegerName[Range[1000]]
@Doorknob has a leaner implementation:
Tr@StringLength@IntegerName@Range@1000
(* 20961 *)
Explanation
IntegerName[Range …
1
vote
Sort odd numbers first
Mathematica 25 bytes
Flatten@GatherBy[#, OddQ] &