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Railways PYQCBT 1 2016

RRB NTPC · Question 16

The instrument used for ancient mathematical calculations is called _______. A. Calculator B. Abacus C. Table D. Graphing

  1. B

  2. D

  3. C

  4. A

Show answer & explanation

Answer: (A) B

Explanation

The abacus, a frame of beads on rods, was the ancient tool for arithmetic calculation, used in Mesopotamia, China and elsewhere.