When $555_{10}$ is expressed in this base, it has 4 digits, in the form ABAB, where A and B are two different digits.  What base is it?
Question:
When $555_{10}$ is expressed in this base, it has 4 digits, in the form ABAB, where A and B are two different digits.  What base is it?
Answer:
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When $555_{10}$ is expressed in this base, it has 4 digits, in the form ABAB, where A and B are two different digits.  What base is it?
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