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Q: Is the sum of two natural numbers always a natural number?

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Yes.natural numbers are closed under multiplication.It means when the operation is done with natural numbers in multiplication the sum of two numbers is always the natural number.

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.

The sum of the first 100 natural numbers is 5,001.

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.

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 the first 10 natural numbers is 51.

The sum of the first 57 natural numbers is 1,625.

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

The sum of two odd numbers is always an even number

The sum of two positive numbers is always a positive number.

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

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.

It is always an irrational number.

That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.

No, the sum of two consecutive numbers is always an odd number, and is not divisible by two.

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

The sum of the first 50 natural numbers is 1,251.

No. Odd numbers can be written as the sum of consecutive integers, but some multiples of odd numbers are even.

The sum of two odd numbers is always even; the sum of three odd numbers is always odd; the sum of four odd numbers is always even; the sum of five odd numbers is always odd; etc

Yes, when you add any group of natural numbers, the sum will also be a natural number.

Yes.Since 1 is a member of the Fibonacci sequence, it is always possible. Any natural number, N, can be represented as a sum of a string of N ones.Yes.Since 1 is a member of the Fibonacci sequence, it is always possible. Any natural number, N, can be represented as a sum of a string of N ones.Yes.Since 1 is a member of the Fibonacci sequence, it is always possible. Any natural number, N, can be represented as a sum of a string of N ones.Yes.Since 1 is a member of the Fibonacci sequence, it is always possible. Any natural number, N, can be represented as a sum of a string of N ones.

Yes, when adding two odd numbers together the sum will always be an even number.

'a' can be any number whatsoever. The sum of +a and -a is always zero.

The sum of the first 200 natural numbers is 20,001.

Yes, because naturals are counting numbers, {1,2,3...} and any natural number added by another natural number has to be a natural. Think of a number line, and your adding the natural numbers. The sum has to be natural, so yes it is closed.