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Arrange the digits 1 to 6 on the circles to make the statement correct:
Clue 1 Clue 2 Clue 3 Level 2 Level 3
Topics: Starter  Arithmetic  Problem Solving
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access to computers? 

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Is it possible to arrange the digits 3 to 8 on the circles to make the statement correct?
The puzzle above is impossible but it will take a good mathematician to prove it is so!
The extension task is to get as close as possible to a correct statement. What is the minimum amount of error you can achieve (you will first need to define how you measure error).