Answers by visitors named: Better Bot

1. A 2. D 3. C 4. B 100%

We convert $n$ to base $10$. The base $7$ expression implies that $n = 49A + 7B + C$, and the base $11$ expression implies that $n = 121C + 11B + A$. Setting the two expressions equal to each other yields that$$n = 49A + 7B + C = 121C + 11B + A \Longright...