Fig. 9.
TRIANGLES WITH MATCHES
Make three equilateral triangles with six matches. Of course, two can be made with five matches; but then there is one over, and how to make a third triangle with only one match is a puzzler. It is as easy as possible. Make a triangle with three matches, and stand the other three upon end inside the triangle in the form of a tripod ([Fig. 10]).
Fig. 10.
Here is another triangular puzzle. With five matches form two equilateral triangles. Tell the company they are to remove three matches; then add two and make two more equilateral triangles. This is only a “sell.” You do not say where the two matches are to be added. You add them to the three removed, and form the same figure over again ([Fig. 11]).
Fig. 11.