12 Days of Christmas
126th
Abundant Numbers
10th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
10th
Divisors
66th
Evil Numbers
101st
Evil Numbers (Long)
71st
Fibonacci
307th
Fizz Buzz
504th
Foo Fizz Buzz Bar
14th
Leap Years
74th
Medal Tally
19th
Niven Numbers
116th
Odious Numbers
82nd
Odious Numbers (Long)
56th
Pernicious Numbers
69th
Pernicious Numbers (Long)
32nd
Prime Numbers
89th
Tongue-twisters
44th