8 I think P.S. I am only P7
To achieve 9 squares with 24 toothpicks and then remove 4 while still maintaining the 9 squares, you can create a 3x3 grid of squares. Initially, the grid uses 12 toothpicks for the outer squares and 12 for the inner squares. By strategically removing 4 interior toothpicks that don't affect the overall formation of the squares, you can still keep the 9 squares intact. This approach allows you to maintain the structure while reducing the number of toothpicks used.
24
3 3x3 = 9 3x8=24
8
24
24 squares are covered on a checker board.
There are 16 different possibility's (you work this out by doing 24, the amount of small squares in it) but only 6 of the have not been rotated or reflected. The real problem is a 3x3 square.
44
There are 32 red squares on a 8x8 regular checker board.
Answer: 24 ft² = 2.22967 m²
A Square which has been divided up into 24 smaller squares.
Eight squares are needed.