A square patchwork quilt is made by joining four square pieces of cloth like this
, each piece coloured grey and white as shown. Only edges of the same colour are sewn together. How many different quilt patterns are possible? (Two patterns are considered to be the same if one can be rotated to look exactly like the other.)
Select one option, then click Submit.
3
4
5
6
8
Select an option, then submit.
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Intermediate Mathematical Challenge 2001 (2001)
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