12 Days of Christmas
305th
Arabic to Roman
181st
Divisors
449th
Emirp Numbers
143rd
Evil Numbers
411th
Fibonacci
161st529th754th114th202nd82nd105th214th1,947th112th249th
Fizz Buzz
1,263rd
Happy Numbers
180th
Leap Years
141st
109th
Morse Decoder
84th
Morse Encoder
83rd
Niven Numbers
327th
Odious Numbers
324th
Pernicious Numbers
195th
Prime Numbers
431st
Roman to Arabic
111th
Seven Segment
90th