Route & Network Puzzles 157possible roads are indicated by the lines, and he always walks either due N,
due E, or NE; that is, he goes so that every step brings him nearer to
the church. Can you count the total number of different routes from which
he may select?
- THE SUBMARINE NET
The illustration is supposed to represent a portion of a long submarine net,
and the puzzle is to make as few cuts as possible from top to bottom, to di-
vide the net into two parts, and so make an opening for a submarine to pass
through.
Where would you make the cuts? No cuts can be made through the knots.
Remember that the cuts must be made from the top line to the bottom.
- THE TWENTY-TWO BRIDGES
We have a rough map on page 158 of a district with an elaborate system of
irrigation, as the various waterways and numerous bridges will show. A man
set out from one of the lettered departments to pay a visit to a friend living