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It's just one of those laws of maths.

It can be used as an indication to whether the answer could be right.

It's similar to even + even = even

Even + odd = odd

Odd + odd = even

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15y ago

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Related Questions

When is a number a multiple of 2?

A number is a multiple of two when it's even.


What is an even number?

An even number is a multiple of two and an odd number is not.An even number is an integer that is divisible by two.


The difference of two even number is always an even number?

Yes, the difference between two even numbers is always an even number.


What happens when you add an odd number and an odd number?

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.


Why is every multiple of two an even number?

Because your beginning number was a multiple of 2.


What is the multiple of two?

Any even number.


Can a common multiple of two even numbers be odd?

No. A multiple of an even number cannot be odd.


A multiple with two even factors will always be even true or false?

false


What makes a number even?

a number to be even has to be spread into two different parts equally that is what makes something even. The number must be a multiple of two.


Is 14 a even number?

Yes, 14 is an even number.An even number is an integer which is a multiple of two


Is a number even when the largest digit in the number is even?

No, in order for the number to be even, the last number must be a multiple of 2. It doesn't matter what the largest number is as long as the last number is a multiple of two.


Why does an even number plus an odd number always equal an odd number?

For any even number n, the following integer is odd (n+1), so for any odd number other than 1, you are adding the preceding even number, plus 1. Because all even numbers are multiples of 2, their sum is even, and 1 more will be an odd number.---Think of the odd number as an even number plus one and remember that all even numbers are multiples of two.Therefore:- Any two even numbers added together will always be a multiple of two and therefore even. Any two odd numbers added together will be the same as adding two even numbers plus 1 plus 1. (A multiple of two plus two which is still a multiple of two).An odd number added to an even number will be the same as two even numbers plus 1 in other words a multiple of two (even) plus one making the result odd.Extrapolating further it's easy to see that by the above reasoning that for all positive integers...Any number of even numbers added together will always be even.An odd number of odd numbers added together will always be odd.Any even number of odd numbers added together will always be even,Adding any number of even numbers to any number of odd numbers will make no difference to the outcome, the odd or even outcome will still be determined by the number of odd numbers being added together.---Another approach:Let n, r be real numbers even number representation: 2nodd number representation: 2n + 1sum = 2n + 2n + 1 = 4n + 1 = 2(2n) + 1let 2n = rsum representation becomes: 2r + 1, which is a representation of an odd number.