The Postman's route runs through a dozen of houses, but this day he only
needs to visit half of them. The challenge for him is to choose the
shortest route. Can you help the Postman with that?
Stack three dice in a tower. Glance at it for a moment and... say the sum
of spots on the hidden faces. You know for sure you won't miss but what's
the trick?
When two identical bolts are placed together so that their helical grooves intermesh, what it is supposed to happen when the bolts are moved around each other in the clockwise direction?
A set of chairs has to be arranged along the walls of a rectangular dance
hall in such a way that there are an equal number of them along each wall.
What pattern to choose for this?
Another gem in our series of puzzles where several things should be placed
so that each of them touches every other. This time you'll need... six and
more
pencils.
