Find $9^{-1} \pmod{100}$, as a residue modulo 100.  (Give an answer between 0 and 99, inclusive.)
Question:
Find $9^{-1} \pmod{100}$, as a residue modulo 100.  (Give an answer between 0 and 99, inclusive.)
Answer:
Let's think step by step.

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Find $9^{-1} \pmod{100}$, as a residue modulo 100.  (Give an answer between 0 and 99, inclusive.)
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