1+1+1+1+9
1+1+1+3+7
1+1+1+5+5
1+1+3+3+5
1+3+3+3+3
If limited to positive odd numbers, there are no more ways other than permutations of the above. If not limited to positive numbers, then there are infinitely many ways, eg:
-3 + 3 - 5 + 5 + 13
Take two pairs of odd numbers. Attach a negative sign to one of each pair, and add 13 as the fifth number!
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Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.
The sum of two odd numbers is always even.
The sum of two odd numbers is always even.
The sum of two whole numbers is odd when one but not both of them is odd.
The sum of two odd numbers is an even number.
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
The sum of an odd number of odd numbers will be odd.
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 three odd numbers will always be odd.
Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.
The sum of two odd numbers is always even.
You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.You cannot. The sum of 5 odd numbers must be odd. 30 is not odd.
The sum of two odd numbers is always even.
The sum of two odd numbers or two even numbers is an even number. The sum of an odd number and an even number is an odd number.
The sum of two whole numbers is odd when one but not both of them is odd.
37
The sum of the first 15 odd numbers is 225.