Abundant Numbers
616716
Abundant Numbers (Long)
640701
Arabic to Roman
367
Arithmetic Numbers
667725
Billiards
621
Christmas Trees
625
Collatz
707817
Cubes
379
Diamonds
408
Divisors
667720
Evil Numbers
648
Evil Numbers (Long)
636
Fibonacci
742873818
Fizz Buzz
541633
Happy Numbers
557
Leap Years
740833768
Niven Numbers
598687
Niven Numbers (Long)
600672
Number Spiral
387
Odious Numbers
562660
Odious Numbers (Long)
673
Pascal’s Triangle
581
Prime Numbers
670
Prime Numbers (Long)
630
Roman to Arabic
285
Sierpiński Triangle
251
Tongue-twisters
538