12 Days of Christmas
413
99 Bottles of Beer
506
Abundant Numbers
721
Arabic to Roman
607
Christmas Trees
750
CSS Colors
135
Divisors
900
Emirp Numbers
505
Evil Numbers
816
Fibonacci
947
Fizz Buzz
869
Happy Numbers
558
Leap Years
782
Look and Say
403
Morse Decoder
269
Niven Numbers
815
Odious Numbers
800
Ordinal Numbers
623
Pangram Grep
753
Pascal’s Triangle
521
Pernicious Numbers
702
Prime Numbers
656
Rock-paper-scissors-Spock-lizard
502
Roman to Arabic
471
Spelling Numbers
Tongue-twisters
442
United States
267