Arabic to Roman
477
Arrows
568
Card Number Validation
601
Christmas Trees
534
664
Collatz
754
Cubes
359
Emirp Numbers
510
Fibonacci
511
428
Fizz Buzz
641
Leap Years
730
ln 2
763
Morse Encoder
590
Prime Numbers
633
Roman to Arabic
520
Transpose Sentence
790
United States
Zeckendorf Representation
617
τ
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