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The Guardian - UK
The Guardian - UK
Science
Alex Bellos

Did you solve it? The simple question almost everyone gets wrong

United Kingdom
Stenciletto

Earlier today I set you these six stencil puzzles, based on a IQ test for children devised by the American psychologist Grace Arthur in the 1920s.

In each puzzle there is a patterned square at the top. The challenge is to work out how to create this square by placing some of the available stencils and coloured blocks on top of each other.

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