12 Days of Christmas
670
99 Bottles of Beer
680
Abundant Numbers
723
Christmas Trees
807
Cubes
501
Diamonds
472
Divisors
781
Emirp Numbers
540
Emojify
389
Evil Numbers
820
Fizz Buzz
782
Happy Numbers
555
Intersection
465
Leap Years
627
Leyland Numbers
316
Look and Say
627
Lucky Tickets
391
Morse Decoder
343
Morse Encoder
302
Niven Numbers
736
Odious Numbers
860
Ordinal Numbers
571
Pangram Grep
528
Pascal’s Triangle
619
Pernicious Numbers
852
Poker
796
Prime Numbers
590
Recamán
644
Rock-paper-scissors-Spock-lizard
466
Roman to Arabic
243
Rule 110
541
Seven Segment
610
Spelling Numbers
609
Tongue-twisters
503
United States
159