Abundant Numbers
162nd
70th
Abundant Numbers (Long)
87th
56th
Arabic to Roman
39th
Arithmetic Numbers
62nd
41st
Billiards
6th
Christmas Trees
28th
Collatz
163rd
58th
Cubes
20th
Diamonds
34th
Divisors
225th
75th
Evil Numbers
79th
Evil Numbers (Long)
61st
Fibonacci
327th88th126th1,036th
Fizz Buzz
528th
239th
Happy Numbers
35th
Leap Years
197th
56th407th
Niven Numbers
126th
61st
Niven Numbers (Long)
66th
55th
Number Spiral
20th
Odious Numbers
138th
63rd
Odious Numbers (Long)
51st
Pascal’s Triangle
40th
Prime Numbers
72nd
Prime Numbers (Long)
67th
Roman to Arabic
23rd
Sierpiński Triangle
32nd
Smith Numbers
30th
23rd
Tongue-twisters
39th