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Q: What numbers must you add to make an even number?

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No. If you have an odd number (for example 5) and an even number (say 2) and you multiply them together, you will get an even number (10). Therefore, just because the product of two numbers are even does not make both the numbers being multiplied together even (although at least one must be).

because in a mean for 7 with three numbers the total of the 3 numbers must be 21 and (even number) + (even number) = (even number) 21 is odd Q.E.D

Even numbers must have a factor of two.

Even numbers must have 2 amongst their factors; they may have other even numbers amongst their factors. Odd numbers must not; every factor of an odd number must be odd.

Look at the first 2 of these prime numbers. They cannot be even for then they would be divisible by 2, so not prime. Add them together. Two odd numbers added together make an even. Subtract this even number from 50 (also even) so the third number must be even. There is no way of adding 3 prime numbers together to make an even number.

Not necessarily, but at least ''one'' of them must be even, unless the two numbers are both the (irrational) square root of the same even number.

One of the numbers being mutiplied must be even.

When adding two numbers together it must be divisible by two. Being divisible by two is the definition of an even number.

Any two consecutive numbers must comprise one odd and one even number, so their product must be even. Any three consecutive numbers must include two consecutive numbers so the result still applies.

it creates an even number cause 2 is an even number so no matter what two same numbers add up it must give you an even number

81

If you have to find a median in a set of numbers in which there are an even number of entries, you must find the average of the two numbers the come in the middle.

Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction. You must make sure it can be written as a fraction.

yes. for a number to be even it must be divisible by 2. odd numbers can be divisible by 2.Yes as for example -4 is an even number

21

Some. Any product of a set of odd numbers will be odd. To be even, a composite number must have at least one even factor. Therefore odd composite numbers must exist.

The sum of 2 consecutive numbers cannot be 118, because you cannot get an even number when you add an even and an odd number.

The GCF of an odd and an even number must be odd since odd numbers do not have any even factors.

No. Since odd numbers don't have any even factors, the GCF of odd and even must be odd.

It is not possible. The sum of two odd number MUST be even so the sum of four odd numbers must be even. 165 is not even so the task is not possible.

At least one of the two numbers has to be even, but both can be even.

Yes.Additional Information:If you have two consecutive numbers, one of them will be an odd number and the other will be an even number. Since even numbers are divisible by 2, the only even prime number is 2. If two consecutive numbers are prime, the even number must be 2. So, because 1 is not a prime number, the only time that two consecutive numbers can be prime is in the case of 2 and 3.

As the number 1 is considered a special case and not a prime, there cannot be three consecutive numbers that are prime. Any three consecutive numbers must include at least one even number. With the exception of the number 2, no even numbers are prime.

Yes because the product of each pair of negative numbers must be positive.

Firstly, the number must be even. 2520 is perfectly divisible.