taking some matches
out of the latter and adding them to the upper part of the figure, or
vice versa. If this is not done the stop will always be made at the same
match, which will give the trick away.

[Illustration]
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).

[Illustration]
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.

MATCH SQUARES

Make nine squares with twenty-four matches (Fig. 12). Then request some
one to remove eight matches, and without touching those left, to leave
two perfect squares.

-- -- --
| | | |
-- -- --
| | | |
-- -- --
| | | |
-- -- --
Fig. 12.

Fig. 13 shows the solution.

-- -- --
| |
--
| | | |
--
| |
-- -- --
Fig. 13.

YOUR OPPONENT MUST TAKE THE LAST MATCH

Place twenty-five matches in a row on the table. Request some one to
select one end of the row and to take one, two, or three matches from
it, you havin