12 Days of Christmas
489
99 Bottles of Beer
656
Abundant Numbers
604
Christmas Trees
793
Cubes
477
Diamonds
462
Divisors
769
Emirp Numbers
373
Emojify
273
Evil Numbers
816
Fizz Buzz
774
Happy Numbers
452
Intersection
449
Leap Years
620
Leyland Numbers
311
Look and Say
621
Lucky Tickets
386
Morse Decoder
331
Morse Encoder
284
Niven Numbers
702
Odious Numbers
853
Ordinal Numbers
562
Pangram Grep
519
Pascal’s Triangle
617
Pernicious Numbers
843
Poker
592
Prime Numbers
566
Recamán
632
Rock-paper-scissors-Spock-lizard
460
Roman to Arabic
236
Rule 110
527
Seven Segment
594
Spelling Numbers
609
Tongue-twisters
377
United States
157