12 Days of Christmas
127th
Abundant Numbers
10th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
10th
Divisors
67th
Evil Numbers
101st
Evil Numbers (Long)
71st
Fibonacci
309th
Fizz Buzz
505th
Foo Fizz Buzz Bar
15th
Leap Years
75th
Medal Tally
19th
Niven Numbers
118th
Odious Numbers
85th
Odious Numbers (Long)
58th
Pernicious Numbers
71st
Pernicious Numbers (Long)
32nd
Prime Numbers
89th
Tongue-twisters
44th