12 Days of Christmas
340th
Arabic to Roman
201st
Divisors
477th
Emirp Numbers
158th
Evil Numbers
447th
Fibonacci
183rd612th822nd133rd237th95th130th233rd2,156th141st283rd
Fizz Buzz
1,344th
Happy Numbers
195th
Leap Years
181st
116th
Morse Decoder
95th
Morse Encoder
101st
Niven Numbers
363rd
Odious Numbers
347th
Pernicious Numbers
218th
Prime Numbers
469th
Roman to Arabic
123rd
Seven Segment
105th