Abundant Numbers
554629
Abundant Numbers (Long)
597657
Arabic to Roman
343
Arithmetic Numbers
622677
Billiards
542
Christmas Trees
581
Collatz
670774
Cubes
338
Diamonds
379
Divisors
645681
Evil Numbers
591
Evil Numbers (Long)
592
Fibonacci
706838807
Fizz Buzz
530614
Happy Numbers
412
Leap Years
716788756
Niven Numbers
573644
Niven Numbers (Long)
565619
Number Spiral
352
Odious Numbers
536598
Odious Numbers (Long)
622
Pascal’s Triangle
535
Prime Numbers
603
Prime Numbers (Long)
588
Roman to Arabic
255
Sierpiński Triangle
230
Tongue-twisters
371