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'How Many Pieces This Time?' printed from http://nrich.maths.org/
You might like to try How Many Pieces? before you have a look at this problem.
You can see how many loops of string were used to make these string patterns because the strings are different colours.
In the next pictures can you work out how many loops were used?
Can you describe how you know?
You might like to print off this sheet
of the pictures if you would like to work on paper.