Arabic to Roman
489
Arrows
583
Card Number Validation
626
Christmas Trees
561
675
Collatz
770
Cubes
365
Emirp Numbers
519
Fibonacci
530
434
Fizz Buzz
646
Leap Years
741
ln 2
788
Morse Encoder
601
Prime Numbers
645
Roman to Arabic
536
Transpose Sentence
831
United States
Zeckendorf Representation
643
τ
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