The Number System based on "0" and "1" only is known as
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Binary System
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Barter System
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Number System
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Hexa Dexcimal System
A
Correct answer
Explanation
The Binary System uses only two digits: 0 and 1. This is the fundamental number system used in digital computing because electronic circuits can easily represent two states (on/off). Barter is an economic exchange system, not a number system.