How Do You Solve a Rubik’s Cube?
How Do You Solve a Rubik’s Cube? In the year 1974, Hungarian professor of architecture Ernő Rubik created a three-dimensional cube with rows of blocks that would...
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What Are Pencils with Erasers?
Who Thought of Putting an Eraser on a Pencil? Pencils with erasers are an American phenomenon. The first patent on an integral pencil and eraser got assigned in the...
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