12 Days of Christmas
28th
Arabic to Roman
82nd
Divisors
127th1,076th41st
Emirp Numbers
50th
Evil Numbers
1,146th62nd
Fibonacci
200th1,427th132nd
Fizz Buzz
233rd
98th
Happy Numbers
52nd
Leap Years
56th
Morse Decoder
17th
Niven Numbers
54th
Odious Numbers
55th
Pascal’s Triangle
59th
Pernicious Numbers
60th
Poker
13th
Prime Numbers
81st
Quine
77th
Spelling Numbers
93rd