Abundant Numbers
17th
Abundant Numbers (Long)
3rd
Arithmetic Numbers
28th
Catalan Numbers
29th
Collatz
3rd
Divisors
45th34th
Evil Numbers
40th
156th
Evil Numbers (Long)
48th
Fibonacci
125th
Fizz Buzz
11th3rd
Foo Fizz Buzz Bar
21st
Happy Numbers
31st
Happy Numbers (Long)
18th
Leap Years
52nd
Leyland Numbers
27th
Niven Numbers
79th
Niven Numbers (Long)
42nd
Odious Numbers
55th25th515th
Odious Numbers (Long)
42nd
Pascal’s Triangle
40th53rd
Pernicious Numbers
52nd
Prime Numbers
47th
Prime Numbers (Long)
37th
Recamán
22nd
Smith Numbers
25th
Sudoku
12th
Van Eck Sequence
17th