12 Days of Christmas
30th
Arabic to Roman
69th
Divisors
111th980th48th
Emirp Numbers
49th
Evil Numbers
1,020th57th
Fibonacci
180th1,250th107th
Fizz Buzz
218th
96th
Happy Numbers
48th
Leap Years
54th
Morse Decoder
16th
Niven Numbers
49th
Odious Numbers
52nd
Pascalβs Triangle
57th
Pernicious Numbers
53rd
Poker
9th
Prime Numbers
75th
Quine
72nd
Spelling Numbers
74th