12 Days of Christmas
668
99 Bottles of Beer
678
Abundant Numbers
725
Christmas Trees
802
Cubes
496
Diamonds
468
Divisors
776
Emirp Numbers
534
Emojify
383
Evil Numbers
812
Fizz Buzz
780
Happy Numbers
550
Intersection
527
Leap Years
692
Leyland Numbers
312
Look and Say
619
Lucky Tickets
386
Morse Decoder
341
Morse Encoder
300
Niven Numbers
729
Odious Numbers
851
Ordinal Numbers
568
Pangram Grep
526
Pascal’s Triangle
615
Pernicious Numbers
844
Poker
797
Prime Numbers
584
Recamán
634
Rock-paper-scissors-Spock-lizard
461
Roman to Arabic
241
Rule 110
534
Seven Segment
608
Spelling Numbers
603
Tongue-twisters
539
United States
175