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Q: Does a odd number plus a odd number always equal a even number?

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An odd number plus an even number will always be an odd number.

An even number

Yes, an even number plus an even number is always even. Also, and odd number plus an odd number is always even.

All even numbers can be divided by two, while odd numbers can't. Also, an even number plus an even number is always even. An odd number plus an odd number is always even. An even number plus an odd number is always odd.

Even. Always

always even

Always.

The sum of an odd and even number is always odd because there's always one left over. Think of any odd number as being any even number plus one. If you add two even numbers, the answer is always even. If you add an even and an odd (plus one), the answer is always odd.

In normal arithmetic, never.

An even number.

Yes, always.

The sum of an odd and even number is always odd because there's always one left over. Think of any odd number as being any even number plus one. If you add two even numbers, the answer is always even. If you add an even and an odd (plus one), the answer is always odd.

The sum of an odd and even number is always odd because there's always one left over. Think of any odd number as being any even number plus one. If you add two even numbers, the answer is always even. If you add an even and an odd (plus one), the answer is always odd.

yes

The sum of any two odd numbers is always even. This is because (a) any odd number can always be expressed as an even number plus 1, and (b) the sum of two even numbers is always even. So if X is even and Y is even then X+1 added to Y+1 will equal X+Y+2

Any odd number can be written as an even number plus one. Any even number plus any other even number makes an even number. Add one makes an odd number. So an odd number plus an even number is always an odd number. Algebraically, any odd number can be written as 2a+ 1 where a is a whole number. Any even number can be written as 2b, where b is a whole number. Add them together, the sum is 2(a + b) + 1, which is odd.

A negative plus a negative still gives a negative answer.

You can simply take the lowest even numbers and subtract it i.e. 4-2=2

It will always be odd. A proof: Call the even number m, call the odd number p. 'p' is equal to an even number 'n' + 1. Adding m and p is equal to m + n + 1; since m and n are both even, their sum is also even (see the related questions). m + n + 1 is one more than an even number, so it is odd, and therefore an odd number plus an even number is also always odd. QED

No. it's not a prime number when x = 40, 41, 81,82 ...

Yes, always; this is because an odd number is 2E + 1 (E being any even number), and two odd numbers equal 2E1 + 2E2 + 2 x 1 = a lot of even numbers plus two, which is another even number.

Because the sum of two odd numbers is always even and the sum of that even number plus another odd number is always odd.

No. It can only become even more negative.

no, b/c you can think of an odd number as an even number plus one. So if you add two odd numbers, you would be adding 2 even numbers plus 2... Let # be even... (#+1) + (#+1) = (#+#) + 2 two even numbers added together are always even

Even