99 Bottles of Beer
19th
Arabic to Roman
Christmas Trees
10th
Cubes
4th
Diamonds
7th
Divisors
1st55th
Emirp Numbers
22nd
Evil Numbers
40th
Fibonacci
79th
Fizz Buzz
29th
Happy Numbers
Leap Years
19th
Leyland Numbers
18th
Niven Numbers
35th
Odious Numbers
38th
Ordinal Numbers
19th
Pangram Grep
18th
Pascal’s Triangle
24th
Pernicious Numbers
33rd
Prime Numbers
42nd
Quine
65th