Question 53
We consider the number $666\ldots666$ which consists of $2023$ sixes. The square of this number has $4046$ digits.
How many of those digits are a $5$?
How many of those digits are a $5$?
MathNet 2023-part-04 — 191 problems (EN–VI) Question 53
Math Olympiad Vault · MathNet 2023-part-04 — 191 problems (EN–VI)