They have only one thing in common. By adding 1 to either an even number or an odd number makes them opposite. (even becomes odd and odd becomes even).
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There is no such pattern because there are no even odd numbers. Odd numbers, by definition, are odd and therefore, not even.
The answer depends on how many odd numbers are being added together: even numbers make no difference.If the count of odd numbers is odd then the total is odd, andff the count of odd numbers is even then the total is even.
Because odd numbers don't have any even factors so they can't have any in common.
Multiply two odd numbers Add an even and an odd Subtract an odd and an even
The product of two odd numbers is always odd.