12 Days of Christmas
78
99 Bottles of Beer
201
Abundant Numbers
336
Christmas Trees
404
Day of Week
500
Diamonds
399
Divisors
538
Emirp Numbers
190
Evil Numbers
331
Fibonacci
479
Fizz Buzz
763
Foo Fizz Buzz Bar
441
Leap Years
372
Niven Numbers
480
Odious Numbers
307
Pernicious Numbers
182
Prime Numbers
666
Tongue-twisters
337
United States
155