99 Bottles of Beer
30th
Divisors
217th65th
Emirp Numbers
40th
Evil Numbers
117th70th
Fibonacci
366th144th
Fizz Buzz
433rd130th
Happy Numbers
65th
Leap Years
146th55th
Niven Numbers
125th83rd
Odious Numbers
98th62nd
Pascal’s Triangle
107th43rd
Pernicious Numbers
30th
Prime Numbers
243rd73rd
Roman to Arabic
26th
Rule 110
42nd
Spelling Numbers
14th
√2
24th