brainfuck
27th
Card Number Validation
38th
Day of Week
1st
Fibonacci
1st
Fizz Buzz
1st
Leap Years
93rd
Odious Numbers
80th
Ordinal Numbers
78th
Pascalβs Triangle
47th
Quine
28th1st
Reverse Polish Notation
21st
Roman to Arabic
15th
ROT13
12th8th
Tic-tac-toe
36th
United States
19th
Van Eck Sequence
63rd
Ο
22nd