12 Days of Christmas
30th
Arabic to Roman
67th
Divisors
111th967th48th
Emirp Numbers
49th
Evil Numbers
1,005th56th
Fibonacci
177th1,234th106th
Fizz Buzz
216th
96th
Happy Numbers
48th
Leap Years
54th
Morse Decoder
15th
Niven Numbers
49th
Odious Numbers
51st
Pascalβs Triangle
57th
Pernicious Numbers
53rd
Poker
9th
Prime Numbers
75th
Quine
71st
Spelling Numbers
72nd