12 Days of Christmas
391
99 Bottles of Beer
348
Abundant Numbers
671
Arabic to Roman
433
Christmas Trees
514
Diamonds
409
Divisors
701
Emirp Numbers
410
Emojify
418
Evil Numbers
727
Fibonacci
766
Fizz Buzz
495
Happy Numbers
174
Leap Years
632
Leyland Numbers
534
Look and Say
508
Morse Decoder
238
Morse Encoder
247
Niven Numbers
677
Odious Numbers
769
Ordinal Numbers
455
Pangram Grep
560
Pascal’s Triangle
345
Pernicious Numbers
625
Poker
314
Prime Numbers
500
Rock-paper-scissors-Spock-lizard
451
Roman to Arabic
451
Rule 110
299
Seven Segment
332
Sierpiński Triangle
335
Tongue-twisters
345
United States
216
Vampire Numbers
433