12 Days of Christmas
555
99 Bottles of Beer
235
Abundant Numbers
707
Catalan Numbers
332
Catalan’s Constant
70
Christmas Trees
521
Collatz
501
CSS Colors
179
Diamonds
351
Divisors
863
Emojify
294
Evil Numbers (Long)
754
Fizz Buzz
977
Foo Fizz Buzz Bar
860630
Fractions
437
Leap Years
684
Ordinal Numbers
686
Prime Numbers
633
Prime Numbers (Long)
649
Tongue-twisters
679