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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