Abundant Numbers
161st69th
Abundant Numbers (Long)
87th54th
Arabic to Roman
39th
Arithmetic Numbers
62nd40th
Billiards
6th
Christmas Trees
28th
Collatz
163rd57th
Cubes
20th
Diamonds
34th
Divisors
225th74th
Evil Numbers
78th
Evil Numbers (Long)
60th
Fibonacci
326th125th1,027th
Fizz Buzz
525th235th
Happy Numbers
35th
Leap Years
197th56th403rd
Niven Numbers
125th60th
Niven Numbers (Long)
66th54th
Number Spiral
20th
Odious Numbers
138th62nd
Odious Numbers (Long)
50th
Pascal’s Triangle
39th
Prime Numbers
70th
Prime Numbers (Long)
66th
Roman to Arabic
23rd
Sierpiński Triangle
32nd
Tongue-twisters
38th