12 Days of Christmas
78
99 Bottles of Beer
201
Abundant Numbers
336
Christmas Trees
403
Day of Week
500
Diamonds
399
Divisors
538
Emirp Numbers
190
Evil Numbers
331
Fibonacci
479
Fizz Buzz
761
Foo Fizz Buzz Bar
437
Leap Years
372
Niven Numbers
480
Odious Numbers
307
Pernicious Numbers
182
Prime Numbers
666
Tongue-twisters
336
United States
155