X-Cube 2 (by Peter Grabarchuk). Which pattern, when folded along its dotted lines, can create a 1x1x1 cube with no holes? #xcube2 #Grabarchuk #puzzle #cube #fold #foldpuzzle #cubepuzzle #brainteaser #solve #challenge #think #SupportUkraine 🇺🇦
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Circle Keys (by Peter Grabarchuk). Find two identical keys. #CircleKeys #Grabarchuk #puzzle #key #circle #geometry #geometrypuzzle #brainteaser #solve #challenge #think #SupportUkraine 🇺🇦
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