Abundant Numbers
8th
Abundant Numbers (Long)
6th
Collatz
9th
Divisors
6th
Emirp Numbers
9th
Evil Numbers
8th
Evil Numbers (Long)
9th
Fibonacci
9th
Fizz Buzz
12th
Happy Numbers
9th
Leap Years
13th
Niven Numbers
6th
Niven Numbers (Long)
12th
Odious Numbers
8th
Odious Numbers (Long)
5th
Ordinal Numbers
5th
Pangram Grep
1st
Pernicious Numbers
14th
Prime Numbers
7th
United States
8th