99 Bottles of Beer
25th
Abundant Numbers
32nd
Arabic to Roman
19th
Christmas Trees
22nd11th
27th
20th
4th
Divisors
238th
250th
46th
Evil Numbers
96th
79th
35th
Fibonacci
311th
352nd132nd45th
Fizz Buzz
84th333rd
748th194th142nd
Happy Numbers
101st
44th
Leap Years
119th
46th97th43rd30th103rd
31st
Niven Numbers
37th
Ordinal Numbers
28th
Pascal’s Triangle
37th
Pernicious Numbers
82nd
62nd
32nd
Prime Numbers
201st
58th
120th
Prime Numbers (Long)
1st
Quine
109th
Rock-paper-scissors-Spock-lizard
10th
Roman to Arabic
20th
United States
15th
Van Eck Sequence
10th