# MATH

posted by .

What is the sum of the first 70 consecutive odd numbers?

• MATH -

1 through 2*70 - 1 or 139 figure that out by experiment

average = (1+139)/2 = 70

70 * 70 = 4900

• MATH -

By the way
what we really did was :

n[(n*2-1)+1 ]/2

which is n^2

or 70^2

## Similar Questions

1. ### math check

Posted by TchrWill on Thursday, July 14, 2005 at 5:44pm. 2.)The sum of four consecutive odd integers is -336. Set up an equation AND solve for all of the integers. Two ways to approach this. -336/4 = -84 making the 4 consecutive odd …
2. ### SUMS?

what is the sum of the first towo odd numbers?
3. ### Math

Find the sum of the first 35 consecutive odd numbers. What is the sum of the first 350 consective odd numbers?
4. ### Math

What is the sum of the first 40 consecutive odd numbers?
5. ### Math 130

Sum the first two odd numbers, then the first three, the first four, and so on. From these observations could you guess the sum of the first 100 odd numbers?
6. ### Math

Sum the first two odd numbers, then the first three, the first four, and so on. From these observations could you guess the sum of the first 100 odd numbers?
7. ### math

If the first of 1000 consecutive whole numbers is odd, their sum must be a) even b) odd c)prime d) negative Help?
8. ### Algebra

5 times the least of three consecutive odd numbers is 35 more than twice the sum of the greater two. What is the sum of the three consecutive odd numbers?
9. ### Math

5 times the least of three consecutive odd numbers is 35 more than twice the sum of the greater two. What is the sum of the three consecutive odd numbers?
10. ### algebra

What is the sum of the first 700 consecutive odd numbers?

More Similar Questions