12 Days of Christmas
28th
Arabic to Roman
69th
Divisors
111th971st40th
Emirp Numbers
49th
Evil Numbers
1,019th57th
Fibonacci
180th1,250th106th
Fizz Buzz
218th
91st
Happy Numbers
48th
Leap Years
53rd
Morse Decoder
17th
Niven Numbers
48th
Odious Numbers
52nd
Pascalβs Triangle
57th
Pernicious Numbers
53rd
Poker
9th
Prime Numbers
74th
Quine
72nd
Spelling Numbers
74th