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'Weekly Problem 52 - 2011' printed from http://nrich.maths.org/

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The diagram shows two rectangles which enclose five regions.

two rectangles at an angle, one contains the numbers 4,2,5 the other 1,2,3

What is the largest number of regions which can be enclosed by any two rectangles drawn on a sheet of paper?

 

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

This problem is taken from the UKMT Mathematical Challenges.

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