2023 AMC 10B Problems/Problem 10

Solution 1

First, note that since the rectangle covers 2 squares, we only need to guess squares that are not adjacent to any of our other guesses. There are only two ways to do this: one with guesses, and one with . Since the problem is asking for the minimum number, the answer is .

-yourmomisalosinggame (a.k.a. Aaron)