12 Days of Christmas
80
99 Bottles of Beer
214
Abundant Numbers
355
Christmas Trees
426
Day of Week
500
Diamonds
427
Divisors
571
Emirp Numbers
200
Evil Numbers
347
Fibonacci
500
Fizz Buzz
778
Foo Fizz Buzz Bar
459
Leap Years
382
Niven Numbers
509
Odious Numbers
324
Pernicious Numbers
191
Prime Numbers
700
Tongue-twisters
349
United States
171