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Optical Illusion: Only the smartest in the room can make a square by moving only 1 matchstick
A new brain teaser challenges readers to form a square by moving just one matchstick within 8 seconds. This puzzle measures cognitive abilities and logical reasoning skills. A recent brain teaser ...
National Geographic news5y
When circles are finally squared
There is a mathematical side to optical illusions. One professor studies them in hopes of creating a safer world. Man on a roof or ladder against the wall: either way, it just doesn't seem ...