Given that $8^{-1} \equiv 85 \pmod{97}$, find $64^{-1} \pmod{97}$, as a residue modulo 97.  (Give an answer between 0 and 96, inclusive.)
Question:
Given that $8^{-1} \equiv 85 \pmod{97}$, find $64^{-1} \pmod{97}$, as a residue modulo 97.  (Give an answer between 0 and 96, inclusive.)
Answer:
Let's think step by step.

user
47
Given that $8^{-1} \equiv 85 \pmod{97}$, find $64^{-1} \pmod{97}$, as a residue modulo 97.  (Give an answer between 0 and 96, inclusive.)
train