3 ms·

I find it astonishing that the optimal 4 coin distribution shares 3 coins with the actual current 4 coin distribution.

• quink 3y ago
  The first coin’s denomination is 1, so it’d be a given that it would be shared. Two out of four isn’t much less impressive though.
  • hunter2_ 3y ago
    I think you mean two out of three, given that only three are variable. The penny is fixed, as you say, lest the set size fall sharply from 99 to 19 (if there's no smaller than a 5c piece) etc. at which point optimal coinage varies anyway.
  • stevage 3y ago
    Sorry yes, that was dopey of me.