The puzzle for this issue involves three travelers A, B, and
C who leave from the same place
at the same time for the same
destination 9 miles away. Each can walk at 5 mph but they
also
have available a bike that can travel at 15 mph and a skateboard
that can travel at
9 mph. The bike and skateboard can only hold
one person but can be used by
different people at different times
by being left by the side of the road to be
picked up and used by
someone later. All three arrive at the destination
together at
3:00 having gotten there as quickly as possible. The puzzle
is
to determine what time they left and how they got there (i.e.
what modes of transportation were used at what times).