# Difference between revisions of "Odd integer"

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The product of any two odd integers is odd, but the sum and difference of any two odd integers are [[even integer | even]]. | The product of any two odd integers is odd, but the sum and difference of any two odd integers are [[even integer | even]]. | ||

+ | nbj/ | ||

The sum and difference of an [[even integer]] and odd integer are odd. Besides <math>2,</math> all [[prime number | prime numbers]] are odd. | The sum and difference of an [[even integer]] and odd integer are odd. Besides <math>2,</math> all [[prime number | prime numbers]] are odd. |

## Revision as of 17:43, 12 February 2020

An **odd integer** is an integer which is not a multiple of (or equivalently one more than a multiple of ). The odd integers are Every odd integer can be written in the form for some unique other integer .

The product of any two odd integers is odd, but the sum and difference of any two odd integers are even.

nbj/

The sum and difference of an even integer and odd integer are odd. Besides all prime numbers are odd.

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