Roberts master piece how many blocks

This is Robert pyramid. I have a picture of how I worked it out, here it is:
There is also a picture
of his master piece standing
up here:

How many blocks?

Our teacher Mrs Te Whaiti made a pyramid out of blocks today and now we have to figure out how many blocks there are all together. Here is a picture of how I worked it out and Mrs Te Whaiti's mater piece that we had to work out

Number Algebra Patterns

This is my pattern.It goes 100 ,105,110,115,120,125,130,135,140,145,150,155...and it goes on and on.I think that my pattern is clear.