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Here is information about "eighty-one" that you may find useful and interesting. Number Systems Eighty-one is a decimal number and can be written with numbers: 81 Binary is a number system with only 0s and 1s. Eighty-one in binary form is displayed below: 1010001 A Hexadecimal number has a base of 16 which means it includes the numbers 0 to 9 and A through F. Eighty-one converted to hexadecimal is: 51 Roman Numerals is another number system. Below is eighty-one in roman numerals: LXXXI Scientific Notation Sometimes calculators and scientists shorten numbers using scientific notation. Here is eighty-one as a scientific notation: 8.1E+01 Math Here are some math facts about Eighty-one: Eighty-one is a rational number and an integer. Eighty-one is an odd number because it is not divisible by two. Eighty-one is divisible by the following numbers: 1, 3, 9, 27, 81 Eighty-one is a square number because 9 multiplied by itself will equal eighty-one. Number Lookup Eighty-one is not the only number we have information about. Go here to look up other numbers.

Translated Here we have translated eighty-one into some of the most commonly used languages: Chinese: 八十一 French: quatre-vingt-un German: einundachtzig Italian: ottantuno Spanish: ochenta y uno

Currency Here is eighty-one written in different currencies: US Dollars: $81 Canadian Dollars: CA$81 Australian Dollars: A$81 British Pounds: £81 Indian Rupee: ₹81 Euros: €81

Ordinal The cardinal number eighty-one can also be written as an ordinal number: 81st Or if you want to write it with letters only: eighty-first.

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