99 Bottles of Beer
25th
Abundant Numbers
31st
Arabic to Roman
18th
Christmas Trees
22nd11th
27th
20th
4th
Divisors
235th
247th
45th
Evil Numbers
96th
79th
35th
Fibonacci
305th
348th131st44th
Fizz Buzz
84th325th
731st192nd140th
Happy Numbers
101st
44th
Leap Years
116th
46th95th41st29th103rd
30th
Niven Numbers
36th
Ordinal Numbers
27th
Pascalβs Triangle
37th
Pernicious Numbers
79th
61st
31st
Prime Numbers
198th
56th
118th
Prime Numbers (Long)
1st
Quine
107th
Rock-paper-scissors-Spock-lizard
10th
Roman to Arabic
20th
United States
15th
Van Eck Sequence
9th