12 Days of Christmas
487
99 Bottles of Beer
651
Abundant Numbers
607
Christmas Trees
798
Cubes
473
Diamonds
464
Divisors
779
Emirp Numbers
484
Emojify
278
Evil Numbers
815
Fizz Buzz
776
Happy Numbers
456
Intersection
526
Leap Years
694
Leyland Numbers
314
Look and Say
621
Lucky Tickets
388
Morse Decoder
336
Morse Encoder
289
Niven Numbers
708
Odious Numbers
853
Ordinal Numbers
563
Pangram Grep
524
Pascal’s Triangle
617
Pernicious Numbers
846
Poker
779
Prime Numbers
563
Recamán
637
Rock-paper-scissors-Spock-lizard
462
Roman to Arabic
239
Rule 110
532
Seven Segment
599
Spelling Numbers
606
Tongue-twisters
393
United States
174