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!
The sum of two odd numbers is always even.
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 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.
The sum of two odd numbers is always even.
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.
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.
No 5 odd numbers add up to 100. The sum of any two odd numbers is even. The sum of any two even numbers is even. So the sum of any 4 odd numbers must be even. Take that and add an odd number and the sum must be odd. Therefore, the sum of any 5 odd numbers must be odd. 100 is even. In conclusion: The sum of any odd number of odd numbers is 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.
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