12 Days of Christmas
670
99 Bottles of Beer
680
Abundant Numbers
711
Christmas Trees
792
Cubes
500
Diamonds
462
Divisors
768
Emirp Numbers
535
Emojify
386
Evil Numbers
815
Fizz Buzz
775
Happy Numbers
545
Intersection
457
Leap Years
621
Leyland Numbers
311
Look and Say
619
Lucky Tickets
386
Morse Decoder
339
Morse Encoder
298
Niven Numbers
721
Odious Numbers
852
Ordinal Numbers
566
Pangram Grep
519
Pascal’s Triangle
616
Pernicious Numbers
843
Poker
795
Prime Numbers
588
Recamán
632
Rock-paper-scissors-Spock-lizard
459
Roman to Arabic
238
Rule 110
531
Seven Segment
598
Spelling Numbers
609
Tongue-twisters
503
United States
157