# Alien's fingers

Number Theory Level 2

$\large \frac{5_r}{44_r}=(0.121212\ldots)_r$ Aliens of planet X use their total number of fingers as the base of their number system as we do on earth. Let $$r$$ be their number of fingers. Use the equality above, where all the numbers are expressed in base $$r,$$ to find the total number of fingers of an alien of planet X.

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