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