Discussion :: Computer Fundamental Miscellaneous
- Which of the following is still useful for adding numbers?
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Answer : Option C
Explanation :
Abacus : An abacus is a manual aid to calculating that consists of beads or disks that can be moved up and down on a series of sticks or strings within a usually wooden frame. The abacus itself doesn't calculate; it's simply a device for helping a human being to calculate by remembering what has been counted.
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