Abundant Numbers
6th
brainfuck
20th
Christmas Trees
24th
Cubes
10th
Emirp Numbers
22nd
Evil Numbers
45th
Fibonacci
1st
Fizz Buzz
18th
Intersection
15th
Leap Years
70th
Niven Numbers
58th
Odious Numbers
42nd
Ordinal Numbers
33rd
Pascal’s Triangle
14th
Pernicious Numbers
35th
Prime Numbers
47th
United States
16th