Question
the sum of 5 consecutive numbers is 615. find the middle number
Answers
oobleck
615/5 = 123
so, if they were all equal, they would all be 123
So work away from the center
123-2 + 123-1 + 123 + 123+1 + 123+2 = 615
121+122+123+124+125 = 615
so, if they were all equal, they would all be 123
So work away from the center
123-2 + 123-1 + 123 + 123+1 + 123+2 = 615
121+122+123+124+125 = 615