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Odd Number

Concept

Odd Number

An odd number is an integer that is not even. For example, -5, -3, -1, 1, 3, 5 \text{-}5, \ \text{-}3, \ \text{-}1, \ 1, \ 3, \ 5 \, \ldots Odd numbers are usually defined as all numbers nn that can be written in the form n=2k+1,n=2k+1, where kk is an integer.