Abundant Numbers
595
679
Abundant Numbers (Long)
610
660
Arabic to Roman
344
Arithmetic Numbers
630
677
Billiards
542
Christmas Trees
584
Collatz
683
777
Cubes
352
Diamonds
382
Divisors
645
681
Evil Numbers
608
Evil Numbers (Long)
593
Fibonacci
722910838807
Fizz Buzz
532
616
Happy Numbers
516
Leap Years
717
789757
Niven Numbers
576
648
Niven Numbers (Long)
568
629
Number Spiral
352
Odious Numbers
536
608
Odious Numbers (Long)
615
Pascal’s Triangle
536
Prime Numbers
629
Prime Numbers (Long)
588
Roman to Arabic
264
Sierpiński Triangle
235
Smith Numbers
414
497
Tongue-twisters
524