Arabic to Roman
669
Arrows
506
Card Number Validation
748
Christmas Trees
536
762
Collatz
899
Cubes
508
Emirp Numbers
628
Fibonacci
511
428
Fizz Buzz
703
Leap Years
731
ln 2
777
Morse Encoder
664
Prime Numbers
633
Roman to Arabic
321
Transpose Sentence
735
United States
Zeckendorf Representation
844
τ
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