Abundant Numbers
21st
Arithmetic Numbers
12th
Catalan Numbers
17th
Divisors
50th
Evil Numbers
30th
Evil Numbers (Long)
24th
Fibonacci
29th
Fizz Buzz
17th
Foo Fizz Buzz Bar
14th
Happy Numbers
24th
Happy Numbers (Long)
21st
Leap Years
20th
Leyland Numbers
24th
Niven Numbers
9th
Niven Numbers (Long)
15th
Odious Numbers
1st
Odious Numbers (Long)
26th
Pascal’s Triangle
53rd
Pernicious Numbers
28th
Prime Numbers
80th
Prime Numbers (Long)
70th
Smith Numbers
9th