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      Question

      Which among of the following counting device was

      developed in China had rectangular wooden frame and beads on it?
      A Punched card system Correct Answer Incorrect Answer
      B Napier's Bone Correct Answer Incorrect Answer
      C Abacus Correct Answer Incorrect Answer
      D Pascaline Correct Answer Incorrect Answer
      E Mark I Computer Correct Answer Incorrect Answer

      Solution

      The correct answer is C

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