12 Days of Christmas
669
99 Bottles of Beer
678
Abundant Numbers
728
Christmas Trees
805
Cubes
497
Diamonds
470
Divisors
779
Emirp Numbers
538
Emojify
387
Evil Numbers
817
Fizz Buzz
781
Happy Numbers
554
Intersection
526
Leap Years
696
Leyland Numbers
315
Look and Say
622
Lucky Tickets
388
Morse Decoder
343
Morse Encoder
302
Niven Numbers
734
Odious Numbers
856
Ordinal Numbers
568
Pangram Grep
527
Pascal’s Triangle
617
Pernicious Numbers
848
Poker
796
Prime Numbers
588
Recamán
642
Rock-paper-scissors-Spock-lizard
466
Roman to Arabic
242
Rule 110
538
Seven Segment
608
Spelling Numbers
606
Tongue-twisters
502
United States
179