12 Days of Christmas
171
99 Bottles of Beer
339
Abundant Numbers
355
Christmas Trees
426
Day of Week
500
Diamonds
420
Divisors
571
Emirp Numbers
328
Evil Numbers
347
Fibonacci
500
Fizz Buzz
778
Foo Fizz Buzz Bar
486
Leap Years
382
Niven Numbers
509
Odious Numbers
324
Pernicious Numbers
191
Prime Numbers
700
Tongue-twisters
589
United States
171