Suppose that  $a$ and $b$ are digits, not both nine and not both zero, and the repeating decimal  $0.\overline{ab}$ is expressed as a fraction in lowest terms. How many different denominators are possible?
Question:
Suppose that  $a$ and $b$ are digits, not both nine and not both zero, and the repeating decimal  $0.\overline{ab}$ is expressed as a fraction in lowest terms. How many different denominators are possible?
Answer:
Let's think step by step.

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Suppose that  $a$ and $b$ are digits, not both nine and not both zero, and the repeating decimal  $0.\overline{ab}$ is expressed as a fraction in lowest terms. How many different denominators are possible?
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