5. Cut a $3 \times 9$ rectangle into 8 squares.

7 points are awarded for a complete solution to each problem

The maximum total score is 35
5. First, cut the rectangle into three squares of size $3 \times 3$. Leave two of them, and from the third, cut out a square of size $2 \times 2$. Cut the remaining part into 5 squares of size $1 \times 1$. In total, you will have 8 squares.