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# What are the different types of number systems?

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The Hindu-Arabic, Roman and Chinese number systems are three of the commonly used numeral systems in modern times. Other counting systems that were developed by ancient civilizations were the Egyptian, Mayan and Babylonian systems.

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The invention of number systems served three main purposes: to identify the total items in a group, to determine a sequence or series and to distinguish between various types of records or documentations. The Hindu-Arabic system, with its simple notations, gradually became the global norm for counting systems. It is further classified according to the base that is used. The binary system uses base 2, the octal system uses base 8, the decimal system uses base 10 and the hexadecimal system uses base 16.

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## Related Questions

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The Roman numeral equivalent of the number 1992 is MCMXCII. Writing this number in Roman numerals requires breaking the number down into 1900 plus 90 plus 2. The Roman numeral system uses letters and combinations of letters to represent numbers.

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In Roman numerals, "C" stands for the number 100. This is based on the Latin word "centrum," which means "100." As of 2014, Roman numerals are still occasionally used, such as seen in the British monarch Queen Elizabeth II.

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The Roman numeral equivalent of the number 42 is XLII. The Roman numeral system uses letters to denote numbers. The basic Roman numerals used to write numbers up to 100 are as follows: I equals one, V equals five, X equals 10, L equals 50 and C equals 100.