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Pyramid Brain Twist
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http://www.techviva.com/pyramid-brain-twist-29713.html
Submitted by monkiabegam 16 months, 12 hours ago
The Pyramid Brain Twist only has four sides and four axes that rotate, but if you pull the points apart, you will find that it turns inside out. Trying to figure out this puzzle will certainly twist your brain and you going crazy.
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