Posted by reena on Wednesday, October 26, 2011 at 10:58pm.
Which of the following can be the average(arithmetic mean ) of four consecutive positive even integers?

math  Steve, Thursday, October 27, 2011 at 12:39am
The integers are
n2 n n+2 n+4
sum = 4n+4
average = n+1
which is in between the two middle integers. So, since n is even, n+1 must be odd.