12 Days of Christmas
671
99 Bottles of Beer
681
Abundant Numbers
724
Christmas Trees
808
Cubes
502
Diamonds
473
Divisors
782
Emirp Numbers
541
Emojify
390
Evil Numbers
821
Fizz Buzz
783
Happy Numbers
556
Intersection
468
Leap Years
627
Leyland Numbers
317
Look and Say
628
Lucky Tickets
393
Morse Decoder
345
Morse Encoder
303
Niven Numbers
737
Odious Numbers
861
Ordinal Numbers
572
Pangram Grep
530
Pascal’s Triangle
619
Pernicious Numbers
852
Poker
807
Prime Numbers
591
Recamán
645
Rock-paper-scissors-Spock-lizard
468
Roman to Arabic
243
Rule 110
543
Seven Segment
611
Spelling Numbers
612
Tongue-twisters
503
United States
159