Arrange the 6 matchsticks to form 4 equilateral triangles with an edge length equal to that of a single matchstick. Hint: you are allowed to use glue.

Can you add 6 matchsticks to divide the square into 4 pieces with EQUAL shape and ONE coin each?

Here is a hexagon using 6 matchsticks. Move 4 matchsticks to create 2 triangles.

Can you move 4 matchsticks to have 6 equilateral triangles?

Add 2 matchsticks to form 10 triangles. The matchsticks may overlap and do not have to be flat on the surface.

Place 7 matchsticks inside the layout above to form 3 equal shapes. The 3 shapes must be equal in shape and size.