12 Days of Christmas
28th
Arabic to Roman
57th
Divisors
107th
876th
39th
Emirp Numbers
48th
Evil Numbers
917th
55th
Fibonacci
162nd
1,106th
97th
Fizz Buzz
197th
87th
Happy Numbers
45th
Leap Years
50th
Morse Decoder
15th
Niven Numbers
46th
Odious Numbers
50th
Pascalβs Triangle
56th
Pernicious Numbers
51st
Poker
8th
Prime Numbers
71st
Quine
67th
Spelling Numbers
62nd