Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
22nd
Catalan Numbers
22nd
Collatz
3rd
Divisors
43rd31st
Evil Numbers
36th
126th
Evil Numbers (Long)
37th
Fibonacci
109th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
18th
Happy Numbers
28th
Happy Numbers (Long)
15th
Leap Years
46th
Leyland Numbers
23rd
Niven Numbers
68th
Niven Numbers (Long)
32nd
Odious Numbers
43rd18th470th
Odious Numbers (Long)
33rd
Pascal’s Triangle
34th43rd
Pernicious Numbers
43rd
Prime Numbers
41st
Prime Numbers (Long)
33rd
Recamán
20th
Smith Numbers
23rd
Sudoku
10th
Van Eck Sequence
17th