Abundant Numbers
8th
Abundant Numbers (Long)
2nd
Arithmetic Numbers
24th
Catalan Numbers
23rd
Collatz
29th
Divisors
43rd31st
Evil Numbers
36th
128th
Evil Numbers (Long)
37th
Fibonacci
110th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
28th
Happy Numbers
25th
Happy Numbers (Long)
15th
Leap Years
69th
Leyland Numbers
25th
Niven Numbers
70th
Niven Numbers (Long)
33rd
Odious Numbers
44th18th472nd
Odious Numbers (Long)
33rd
Pascal’s Triangle
35th45th
Pernicious Numbers
44th
Prime Numbers
41st
Prime Numbers (Long)
34th
Recamán
20th
Smith Numbers
26th
Sudoku
9th
Van Eck Sequence
18th