What is the Suanpan, a very famous invention of the Chinese, commonly known as?
A
Umbrella
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B
Abacus
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C
Mariner's Compass
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D
Water Clock
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Solution
The correct option is B Abacus The Chinese invented the abacus and used it for calculations. They called it Suanpan. It consists of seven rods with two beads on each rod in the upper deck and five beads in the bottom deck. The beads are counted by moving them up or down towards the beam.