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Q: The sum of a number and what is always that number?

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No, the sum of a prime number and a composite number is not always 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.

Such a sum is always irrational.

Sum of two odd numbers are always even, and the sum of 2 even numbers are also even. The sum of an odd number & an even number are always odd.

Yes, always.

Sum of even factors of a number will always equal an 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.

The sum of two odd primes is always an even answer or number.

No

No.

No

The sum of any two prime numbers is not always a composite number. The sum of 2 and 11 is 13, and 13 is a prime number, not a composite number.

Not always, if the smaller number is 0 or a negative number. Then their sum will be equal or less than the greater number.

The sum is always 3 more than (triple the smallest number).

It is always an irrational number.

Yes.

The result will always be an odd number.

It is always an irrational number.

No. Such a sum can be positive, negative or zero.

It should always be ZERO.

The sum of an odd number and an even number will always give an odd number. Ex: 2 + 5 = 7

No. Sum of odd + odd = even Sum of odd + even = odd Sum of even + even = even

No. No matter what you use, the sum of an odd number and an even number will always be odd.

Yes

The sum of two even numbers is always an even number.