Which times on a digital clock have a line of symmetry? Which look
the same upside-down? You might like to try this investigation and
This investigation explores using different shapes as the hands of
the clock. What things occur as the the hands move.
Do you know the rhyme about ten green bottles hanging on a wall? If
the first bottle fell at ten past five and the others fell down at
5 minute intervals, what time would the last bottle fall down?
There are several approaches to this problem. Finding out how
many kilometres an hour the tortoise travelled at is a very good
starting point for comparing the speeds and time taken to cover the
course by the two animals.