Five positive consecutive integers starting with a have average b. What is the average of 5 consecutive integers that start with b?
if a = 1, we have a set [1,2,3,4,5]
average of that is 15/5 =3
the second set starting with 3 is [3,4,5,6,7] and average 25/5 = 5
What can we tell about this?