Abundant Numbers
8th
brainfuck
19th
Christmas Trees
25th
Cubes
8th
Emirp Numbers
22nd
Evil Numbers
45th
Fibonacci
1st
Fizz Buzz
18th
Intersection
16th
Leap Years
70th
Niven Numbers
58th
Odious Numbers
42nd
Ordinal Numbers
32nd
Pascal’s Triangle
14th
Pernicious Numbers
36th
Prime Numbers
47th
United States
17th