Question

The sum of five consecutive even numbers is 660. what is the sum of the greatest and the smallest among them?

Answer 1

let the smallest no.=x
then x+(x+2)+(x+4)+(x+6)+(x+8)=660
                                         5x+20=660
                                                x=128
smallest=x=128
largast=x+8=136
sum=246