The question is

the sum of 3 consecutive natural numbers is 15 more than the greatest of them. What is the greatest of the three numbers?

I was wondering if it was 7,8,9 or am I totally wrong? Thanks for reading!

Printable View

- Nov 17th 2008, 06:28 PMfecoupefeConsecutive natural numbers
The question is

the sum of 3 consecutive natural numbers is 15 more than the greatest of them. What is the greatest of the three numbers?

I was wondering if it was 7,8,9 or am I totally wrong? Thanks for reading! - Nov 17th 2008, 06:31 PMMath_Helper
Yes, I think they are 7,8,9

We suppose that the numbers are

a, a+1, a+2

the greatest of them is a+2

then

a+a+1+a+2=15+a+2

2a+1=15

2a=14

a=7

Then the numbers are

a=7

a+1=8

a+2=9 - Nov 17th 2008, 06:36 PMfecoupefeAppreciate the answer.
Thanks for taking the time to explain.