12 Days of Christmas
488
99 Bottles of Beer
654
Abundant Numbers
611
Christmas Trees
801
Cubes
478
Diamonds
468
Divisors
781
Emirp Numbers
379
Emojify
279
Evil Numbers
820
Fizz Buzz
778
Happy Numbers
459
Intersection
465
Leap Years
626
Leyland Numbers
316
Look and Say
627
Lucky Tickets
390
Morse Decoder
333
Morse Encoder
289
Niven Numbers
713
Odious Numbers
860
Ordinal Numbers
565
Pangram Grep
527
Pascal’s Triangle
619
Pernicious Numbers
852
Poker
778
Prime Numbers
567
Recamán
642
Rock-paper-scissors-Spock-lizard
461
Roman to Arabic
240
Rule 110
537
Seven Segment
601
Spelling Numbers
609
Tongue-twisters
377
United States
157