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Question
Abacus was the first
Abacus was the first
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Solution
The correct option is D Mechanical calculator
Abacus: A frame containing wires with small balls that move along them. It is a mechanical device that is used to calculate arithmetic calculations quickly also called a counting frame.
It is a mechanical calculator not a electronic, mechanical and electrical calculator .
Hence, option (D) is the correct answer.
Mechanical calculator
Abacus: A frame containing wires with small balls that move along them. It is a mechanical device that is used to calculate arithmetic calculations quickly also called a counting frame.
It is a mechanical calculator not a electronic, mechanical and electrical calculator .
Hence, option (D) is the correct answer.
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