12 Days of Christmas
47th
99 Bottles of Beer
56th
Abundant Numbers
44th
Arabic to Roman
24th
Christmas Trees
55th
CSS Colors
47th
Cubes
13th
Diamonds
31st
Divisors
63rd
Evil Numbers
37th
Evil Numbers (Long)
26th
Fibonacci
105th
Fizz Buzz
183rd
Happy Numbers
25th
Leap Years
82nd
Look and Say
18th
Odious Numbers
42nd
Pangram Grep
39th
Tongue-twisters
28th