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I think am misunderstanding the problem because I have convinced myself that it can not have a valid solution.

I had one fake AHA moment and but then it was gone again. Not sure what that says about me.

Edit and spoiler warning: Looked up the solution and I think the picture is misleading. It implies that pyramid staying on same height.

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The background of paper with lines is very misleading - because it implies that translation of the pyramid is forbidden, when this translation is the key.

I agree, although it's not the lines for me but the boundary of the page itself.

There is always some kind of consideration like that for these types of trick problems.

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