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The Braille system, devised in 1821 by Louis Braille, is a method of reading and writing used by blind people. In the Braille alphabet each letter is represented by the so-called Braille cell, which is a grid of up to how many raised dots?

  1. 6
  2. 12
  3. 7
  4. 9

Answer

The correct answer is A) 6.

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