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The set of odd numbers is an arithmetic sequence. Let say that the sequence has n odd numbers where the first term is a1 and the last one is n.

The formula to find the sum on nth terms for an arithmetic sequence is:

Sn = (n/2)(a1 + an) or

Sn = (n/2)[2a1 + (n - 1)d] where d is the common difference that for odd numbers is 2.

Sn = (n/2)(2a1 + 2n - 2)

Q: What is the formula to find sum of n odd numbers?

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You cannot. The sum of 5 odd numbers is always odd. 30 is not odd.

The given numbers are all odd. The sum of 5 odd numbers must be odd. 50 is not odd so there is no solution.

the only two odd numbers are 57 and 59 which give a sum of 116

5329

The numbers are 51, 53, 55 and 57.

Related questions

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

There is a surprisingly easy formula for this. Sum of n odd numbers = n2 So the sum of the first 600 odd numbers (starting with 1 as the very first odd number) is 6002 = 360000.

You can't find five odd numbers that add up to fifty; the sum of five odd numbers will always be odd.

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

No, the sum of three odd numbers will always 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.

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.

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.

29 cannot be the sum of two odd integers. The sum of two odd integers is always an even integer.

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.