| In this section we look at a range of problems that use the hexagon
configuration as a basis for a number problem. The first appears in
Dudeney's first book, The Canterbury Tales.
We then look at a couple of factor problems - the number inside a
hexagon has to be a factor of the numbers in the hexagon that surround
it. These problems appear to be similar to an  old
19-piece puzzle, shown on the web by the Museum
at the University of Waterloo. In this puzzle it appears that the
aim is to use 19 hexagons to make a 3-sided H-hexagon in which the total
of adjacent pieces always equals a specified sum. Clearly the
piece could also be used to make a magic H-hexagon (as shown here).
The challenge of Numbers 1 - 6 is one that we used in the competition
with our Year 4-5 group. It is included here because of the surprizing
number of solutions that can be found for it.
Then we touch on a problem of primes that matches a similar question
concerning squares.
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