12 Days of Christmas
100
99 Bottles of Beer
361
Arabic to Roman
980
Christmas Trees
165
Cubes
99
Diamonds
93
Divisors
677
Emirp Numbers
481
Evil Numbers
873
Fibonacci
857
Fizz Buzz
917
Fractions
822
Leap Years
706
787
Odious Numbers
870
Pernicious Numbers
794
Quine
1,000
620
Sierpiński Triangle
200
Spelling Numbers
980
Tongue-twisters
652
λ
307