99 Bottles of Beer
18th
Arabic to Roman
Christmas Trees
9th
Cubes
8th
Diamonds
6th
Divisors
108th55th
Emirp Numbers
21st
Evil Numbers
40th
Fibonacci
78th
Fizz Buzz
29th
Happy Numbers
Leap Years
18th
Leyland Numbers
18th
Niven Numbers
34th
Odious Numbers
38th
Ordinal Numbers
18th
Pangram Grep
18th
Pascal’s Triangle
24th
Pernicious Numbers
32nd
Prime Numbers
42nd
Quine
63rd