Arabic to Roman
477
Arrows
568
Card Number Validation
598
Christmas Trees
533
663
Collatz
753
Cubes
359
Emirp Numbers
509
Fibonacci
511
428
Fizz Buzz
641
Leap Years
730
ln 2
763
Morse Encoder
590
Prime Numbers
633
Roman to Arabic
520
Transpose Sentence
787
United States
Zeckendorf Representation
615
τ
809713564150599938