12 Days of Christmas
309th
Arabic to Roman
183rd
Divisors
451st
Emirp Numbers
147th
Evil Numbers
417th
Fibonacci
163rd532nd765th115th205th85th107th215th1,985th115th254th
Fizz Buzz
1,282nd
Happy Numbers
181st
Leap Years
144th
109th
Morse Decoder
86th
Morse Encoder
83rd
Niven Numbers
332nd
Odious Numbers
326th
Pernicious Numbers
195th
Prime Numbers
435th
Roman to Arabic
114th
Seven Segment
90th