Abundant Numbers
19th
Arithmetic Numbers
11th
Catalan Numbers
17th
Divisors
51st
Evil Numbers
30th
Evil Numbers (Long)
24th
Fibonacci
27th
Fizz Buzz
16th
Foo Fizz Buzz Bar
14th
Happy Numbers
23rd
Happy Numbers (Long)
19th
Leap Years
20th
Leyland Numbers
22nd
Niven Numbers
9th
Niven Numbers (Long)
15th
Odious Numbers
1st
Odious Numbers (Long)
25th
Pascal’s Triangle
51st
Pernicious Numbers
28th
Prime Numbers
78th
Prime Numbers (Long)
68th
Smith Numbers
9th