Posted by cee cee on Thursday, May 31, 2012 at 8:22pm.
the sum of 25 consecutive whole numbers is 1000. what is the smallest of the whole numbers?

math  Reiny, Thursday, May 31, 2012 at 8:45pm
First number is a, common difference is 1
sum(25) = 1000
(25/2)(2a + 24(1) ) = 1000
2a + 24 = 80
2a = 56
a = 28