Any odd number is of the form 2n + 1. Adding two of these, call them a and b, will give even numbers (a-1) + 1 and (b-1) + 1. Since you then have 2 even numbers plus (1 +1), you have another even nunmber.
An odd number of odd numbers can not add up to an even number. There fore any 9 (odd) odd numbers can not add up to 50 (even).
Multiply two odd numbers Add an even and an odd Subtract an odd and an even
Always. even + even = even odd + odd = even even + odd = odd odd + even = odd To summarise, if you add like numbers you get even, otherwise you get odd.
None. Any two odd numbers add up to an even number.
37
No. No matter what you use, the sum of an odd number and an even number will always be odd.
even
Two odd numbers always sum to an even number. Always. Two even numbers always sum to an even number, and an odd number and an even number always sum to an odd number.
no
Unless this is a trick question, none of them do. Zero is an even number, so therefore no positive odd number and negative equivalent will add to form an odd number. Similarly, negative odd numbers will add to form negative even numbers, and positive odd numbers will add to equal positive even numbers. Somebody please inform me if I'm missing something simple here.
An even number
because it can, if you add odd numbers the always don't have to be an odd number