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Q: What is the sum of odd numbers 1-99?

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The sum of an odd number of odd numbers will be odd.

Any two odd numbers will have an odd product and an even sum.

The sum of the first 100 odd numbers is 10,000.

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200

The sum of the first 100 odd numbers (1 through 199) is 10000 (ten thou)

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

101 to 199 give 50 odd numbers. Their sum is 7,500.[I'm not too certain that the question meant 'the average total'? But, the odd numbers average total would be 7,500 ÷ 50 = 150]

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.

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.