The decimal system was invented by:
Correct answer: A. Indians
- A. Indians
- B. Greeks
- C. Chinese
- D. Egyptians
Explanation
The decimal system was invented by Indian mathematicians around the 6th century CE. The most significant figure associated with this development is the Indian mathematician and astronomer Brahmagupta. He wrote the "Brahmasphutasiddhanta," in which he introduced the decimal number system, including the concept of zero. This system, often referred to as the Hindu-Arabic numeral system, eventually spread to the Islamic world and Europe, becoming the basis for the modern numerical system used worldwide.
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Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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