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The Guardian - UK
The Guardian - UK
Science
Alex Bellos

Did you solve it? Can you outwit the wizards of Oz?

Uluru / Ayer's Rock at sunset with Iconic Kangaroo Sign. .
Uluru / Ayer's Rock at sunset with Iconic Kangaroo Sign. . Photograph: Alex Bramwell/Alamy

Earlier today I set you these three problems from Parabola, a wonderful magazine from Australia that was first published 60 years ago this month. Here they are again with solutions.

1. The question with no question

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