1. Move the top matchstick from the vertical line to the right side of the horizontal line, forming a square.
2. Move two matchsticks from the top rectangle to form two additional squares on the sides, creating five squares total.
3. Move one matchstick from the top-left square and one from the bottom-right square to form two new squares, resulting in six squares.
4. Remove one matchstick from the seven, leaving six; then move two matchsticks to form the shape of zero.
5. Remove six matchsticks from the fifteen, leaving nine; rearrange two to form the shape of ten.
6. Remove nine matchsticks strategically so that no complete square of any size remains.
Parent Tip: Review the logic above to help your child master the concept of brain teasers worksheet for adults.