Let $N$ be the largest integer whose square has exactly $3$ digits when written in base 9.

What is $N$, expressed in base 9?
Question:
Let $N$ be the largest integer whose square has exactly $3$ digits when written in base 9.

What is $N$, expressed in base 9?
Answer:
Let's think step by step.

user
28_9
Let $N$ be the largest integer whose square has exactly $3$ digits when written in base 9.

What is $N$, expressed in base 9?
train