no
addition
25
Yes, the factors of all odd numbers are odd numbers.
Odd prime numbers under 15 are prime numbers that are greater than 2 and do not have any factors other than 1 and themselves. The odd prime numbers under 15 are 3, 5, 7, 11, and 13. These numbers cannot be divided evenly by any other number except 1 and themselves, making them prime.
The set of even numbers is closed under addition, the set of odd numbers is not.
The numbers are not closed under addition because whole numbers, even integers, and natural numbers are closed.
no
Let + (addition) be a binary operation on the set of odd numbers S. The set S is closed under + if for all a, b ϵ S, we also have a + b ϵ S. Let 3, 5 ϵ the set of odd numbers 3 + 5 = 8 (8 is not an odd number) Since 3 + 5 = 8 is not an element of the set of the odd numbers, the set of the odd numbers is not closed under addition.
No, nor under addition, either. The sum or difference of two odd numbers is NOT an odd number.No, nor under addition, either. The sum or difference of two odd numbers is NOT an odd number.No, nor under addition, either. The sum or difference of two odd numbers is NOT an odd number.No, nor under addition, either. The sum or difference of two odd numbers is NOT an odd number.
Yes. The entire set of natural numbers is closed under addition (but not subtraction). So are the even numbers (but not the odd numbers), the multiples of 3, of 4, etc.
The set of all odd numbers. 1+1=2
No.
You can't. Adding any two odd numbers always gives an even number, which is not a member of the set of odd numbers.
No. 1 + 3 = 4, which is not odd. In fact, no pair of odds sums to an odd. So the set is not closed under addition.
That is correct, the set is not closed.
Because the set is not closed under addition. If x and y are odd, then x + y is not odd.