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'Power Quady' printed from http://nrich.maths.org/
Why do this problem?
This is a short problem that can be used as a lesson starter and it
is non-standard so the learners have to think how to apply what
they know. The problem also requires the learner to work
systematically to be sure they have considered all possible cases
and found all the solutions.
Let the class work on the problem and then make a list of all the
solutions that they have found.
Have we found all possible solutions?
How can we be sure?