Question

need help with Level D and E!!!! Will give medal!
http://www.insidemathematics.org/assets/problems-of-the-month/growing%20staircases.pdf

Answer 1

The problem basically follows the n+n*2+n*3...where n is the total no of steps, and 1, 2, 3... indicate the current step.

Answer 2

Level D and E are similar.

Answer 3

That doesn't really work for D and E.

Answer 4

Using that, take n common
So, n(1+2+3...)
1+2+3... is an AP with the solution n(n+1)/2
So the total blocks = n*n(n+1)/2
The blocks for constructing the nth step is n^2.

Answer 5

I am talking about level D and E,not A, B, and C

Answer 6

that only works for level A, B and C.

Answer 7

I answered for level D and E.

Answer 8

you answered how many blocks make up the first level(the base) of a staircase with n steps?

Answer 9

i'm looking for a rule or an function that helps me determine how many blocks in all are needed for the n steps.

Answer 10

i need a general formula for the whole thing, not only for the base

Answer 11

@kutabs is correct. general formula for level D and E you can use is \(\dfrac{n^2(n+1)}{2}\)