12 Days of Christmas
30th
Arabic to Roman
70th
Divisors
112th993rd48th
Emirp Numbers
49th
Evil Numbers
1,040th57th
Fibonacci
183rd1,271st107th
Fizz Buzz
219th
96th
Happy Numbers
49th
Leap Years
54th
Morse Decoder
16th
Niven Numbers
50th
Odious Numbers
52nd
Pascalβs Triangle
57th
Pernicious Numbers
53rd
Poker
9th
Prime Numbers
75th
Quine
72nd
Spelling Numbers
75th