12 Days of Christmas
30th
Arabic to Roman
78th
Divisors
125th1,078th49th
Emirp Numbers
49th
Evil Numbers
1,138th61st
Fibonacci
199th1,406th131st
Fizz Buzz
231st
103rd
Happy Numbers
52nd
Leap Years
57th
Morse Decoder
16th
Niven Numbers
55th
Odious Numbers
54th
Pascal’s Triangle
58th
Pernicious Numbers
59th
Poker
13th
Prime Numbers
81st
Quine
77th
Spelling Numbers
89th