Abundant Numbers
60th
Divisors
59th647th
Emirp Numbers
31st
Evil Numbers
83rd839th
Fibonacci
151st1,157th
Fizz Buzz
143rd
Happy Numbers
56th
Leap Years
73rd564th
Niven Numbers
89th
Odious Numbers
71st
Pangram Grep
28th
Pascal’s Triangle
48th
Pernicious Numbers
49th
Prime Numbers
98th609th
Quine
79th