12 Days of Christmas
28th
Arabic to Roman
78th
Divisors
125th1,074th41st
Emirp Numbers
49th
Evil Numbers
1,143rd62nd
Fibonacci
200th1,412th131st
Fizz Buzz
232nd
98th
Happy Numbers
52nd
Leap Years
56th
Morse Decoder
17th
Niven Numbers
54th
Odious Numbers
55th
Pascal’s Triangle
58th
Pernicious Numbers
59th
Poker
13th
Prime Numbers
80th
Quine
77th
Spelling Numbers
90th