brainfuck
30th
31st
Card Number Validation
47th
Collatz
81st
Cubes
28th
Day of Week
1st
Fibonacci
1st
Fizz Buzz
1st
Fractions
70th
Leap Years
7th
Odious Numbers
91st
Ordinal Numbers
1st
Pascal’s Triangle
54th
Quine
43rd1st1st
Reverse Polish Notation
24th
Roman to Arabic
16th
ROT13
16th
20th
Scrambled Sort
14th
Tic-tac-toe
51st
United States
5th
Van Eck Sequence
75th
π
21st