Arabic to Roman
689
Arrows
521
Card Number Validation
776
Christmas Trees
561
775
Collatz
919
Cubes
517
Emirp Numbers
642
Fibonacci
530
434
Fizz Buzz
707
Leap Years
741
ln 2
803
Morse Encoder
680
Prime Numbers
645
Roman to Arabic
331
Transpose Sentence
777
United States
Zeckendorf Representation
889
τ
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