Abundant Numbers
576664
Abundant Numbers (Long)
630701
Arabic to Roman
367
Arithmetic Numbers
658725
Billiards
621
Christmas Trees
625
Collatz
696817
Cubes
368
Diamonds
408
Divisors
667720
Evil Numbers
630
Evil Numbers (Long)
636
Fibonacci
726873818
Fizz Buzz
541633
Happy Numbers
443
Leap Years
740833768
Niven Numbers
598687
Niven Numbers (Long)
600664
Number Spiral
387
Odious Numbers
562642
Odious Numbers (Long)
673
Pascal’s Triangle
581
Prime Numbers
642
Prime Numbers (Long)
630
Roman to Arabic
280
Sierpiński Triangle
246
Tongue-twisters
389