# why  is  1 a  unique  number ?rnwhy  is  0  a  whole  number

Mathematics is a subject which is creation of mind not based on observation like science.

The set of whole number is predefined in mathematics involving all the natural number and 0. There isn't any particular reason specifying why '0'is a whole number.

@Amelie: You had perfectly answered the reason for 1 being a unique number. Keep Posting.

Cheers!!

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1.1 is unique because it is considered neither prime or composite.

2.
We all know that 1 is whole number, so when you subtract 1 from 1 the result is 0. Subtraction of 2 whole numbers results also in whole number which in our case is 0. (example: 12-2=10).

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we all know tath the 1 is whole the 0 divides with all whole number

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what do you mean by unique

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please explain waiting

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0 is a whole number because it has a hole in it

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0 is a whole number because it has a hole in it and 1 is a unique number because 1 is neither Prime nor Composite number.

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• 1 is called a unique number because it is neither a prime number nor a composite number. It has only one factor, i.e, the number itself; and to be a composite number also the number must have two factors, i.e, 1 and the number; and a prime number also must have more than two factors. Therefore, 1 is neither prime nor composite. That 's why 1 is a unique number.
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What are you looking for?