Our brain tends to count only the most obvious openings. But you have to think about the whole t-shirt:
- The opening of the pass.
- The two sleeves.
- Opening the bottom of the shirt.
- Large holes visible on the fabric.
By observing carefully, we distinguish 6 holes in the fabric. Since these holes completely pass through the t-shirt, they are visible through the cardboard placed behind.
The solutionš
The calculation is as follows:
- 1 opening for the collar.
- 2 openings for the sleeves.
- 1 opening at the bottom of the shirt.
- 6 torn holes in the fabric.
Total : 10 holes.
It is this answer that is usually expected for this puzzle.