536 Puzzles and Curious Problems

372 Answers

strokes, starting from A and ending at Z. Places in the figure are purposely

not joined up, in order to make the route perfectly clear.

431. THE SIAMESE SERPENT

The drawing cannot be executed

under the conditions in fewer than

thirteen lines. We have therefore to

find the longest of these thirteen lines.

In the illustration we start at A and

end at B, or the reverse. The dotted

lines represent the lines omitted. It

requires a little thought. Thus, the

unbroken line from D to C is longer

than the dotted line, therefore we take

the former. Again, we can get in a

little more of the drawing by taking

the tongue rather than the mouth, but

the part of the tongue that ends in a

straight line has to be omitted.

432. A BUNCH OF GRAPES

There are various routes possible,
and our illustration shows one of
them. But it is absolutely necessary
that you begin at A and end at B, or
the reverse. At any other point in the
drawing a departure can be made in
two or four ways (even numbers),
but at A and B there are three ways
of going (an odd number), therefore
the rule is that you must begin and
end at A and B.