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Below is a fully functioning curved brick wall. Amazingly it uses fewer bricks than a functioning straight brick wall of comparable length. How is this possible?

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In the curved wall, the curves provides strength. In a straight wall of comparable length, one could probably push the wall over. To make a viable wall, several layers are needed, which requires a lot more bricks.

"lateral-thinking" -- it needs lateral strength. :-)

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  • $\begingroup$ You got it! Well done. $\endgroup$
    – Dmitry Kamenetsky
    Sep 4, 2020 at 1:14
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    $\begingroup$ Nice catch on lateral-thinking! rot13: Gur pbeehtngvba nyfb urycf cerirag gur jnyy sebz ohpxyvat. $\endgroup$
    – humn
    Sep 4, 2020 at 1:35
  • $\begingroup$ Hayrff gubfr ner fbzr ernyyl znffvir gerrf, gur jnyy vf bayl n srj srrg gnyy. V qba'g frr ubj n fvatyr jvqgu jbhyq or gbb jrnx. $\endgroup$
    – Acccumulation
    Sep 11, 2020 at 1:57

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