46 Multiplicative persistence 2019-03-21T14:20:13.193

44 How does math work in Anastasiya's world? 2016-08-24T09:12:09.587

27 Abstract Rewriting Challenge (Cops) 2018-03-02T23:59:14.600

24 Code Golf: 6174 - Kaprekar's mythical constant 2011-06-06T21:38:41.077

22 Optimizing SKI compiler 2015-07-16T18:27:25.037

21 Arnold's Cat Map 2017-01-02T18:13:36.297

20 Additive Persistence 2011-03-25T23:18:31.437

17 Create an omnifix calculator 2017-07-27T11:25:43.753

14 Random dice tipping 2011-02-15T22:37:04.490

12 Hitting 495 (Kaprekar) 2011-03-04T23:00:28.527

12 Prove 2+2=2*2 (and similar) 2016-11-22T11:25:25.337

9 Flexagonal flexagation 2016-09-14T23:45:02.340

9 Abstract Rewriting Challenge (Robbers) 2018-03-03T00:03:46.263

4 Generate unique non-sequential string of length n without memory of previously generated strings 2015-02-13T21:30:37.863

2 Looping Random Number Generator 2015-05-08T06:39:14.947