12 Days of Christmas
15th
Abundant Numbers
50th
35th
Arabic to Roman
13th
Divisors
1st
1st
Emirp Numbers
258th
73rd
Evil Numbers
354th
55th
Fibonacci
158th
7th
Fizz Buzz
53rd
1st
Happy Numbers
157th
24th
Leap Years
196th
43rd
Look and Say
82nd
8th
Niven Numbers
171st
27th
Odious Numbers
263rd
45th
Pangram Grep
23rd
Pernicious Numbers
289th
52nd
Prime Numbers
140th
Quine
1st101st58th21st69th
RecamΓ‘n
192nd
17th
Roman to Arabic
37th
Ο
25th