12 Days of Christmas
28th
Arabic to Roman
83rd
Divisors
127th1,084th42nd
Emirp Numbers
50th
Evil Numbers
1,155th62nd
Fibonacci
203rd1,439th133rd
Fizz Buzz
234th
98th
Happy Numbers
52nd
Leap Years
55th
Morse Decoder
18th
Niven Numbers
54th
Odious Numbers
55th
Pascal’s Triangle
59th
Pernicious Numbers
61st
Poker
12th
Prime Numbers
82nd
Quine
78th
Spelling Numbers
95th