12 Days of Christmas
670
99 Bottles of Beer
680
Abundant Numbers
728
Christmas Trees
807
Cubes
500
Diamonds
471
Divisors
780
Emirp Numbers
539
Emojify
389
Evil Numbers
818
Fizz Buzz
782
Happy Numbers
554
Intersection
526
Leap Years
697
Leyland Numbers
315
Look and Say
624
Lucky Tickets
388
Morse Decoder
343
Morse Encoder
302
Niven Numbers
735
Odious Numbers
858
Ordinal Numbers
568
Pangram Grep
527
Pascal’s Triangle
618
Pernicious Numbers
849
Poker
796
Prime Numbers
588
Recamán
642
Rock-paper-scissors-Spock-lizard
466
Roman to Arabic
242
Rule 110
540
Seven Segment
608
Spelling Numbers
606
Tongue-twisters
503
United States
159