Up and down staircase

The amount of blocks that would be needed for a staircase going 5 steps up and 5 steps going down would be 25. Unless you wanted a flimsy stair case with no inside then it would need 9 blocks to form the base (as shown on the diagram above ).

If we had to build a staircase with any numbered steps (for example 8:) we would start to think about how many blocks we needed, as shown above are problem to build a staircase with 5 steps up and 5 steps down was 25 blocks needed. So we thought that the staircase with 8 steps up and steps down would have 64 blocks in total so that we found out these numbers for the staircase are square numbers.

If you do any other number (for example 10) you times that number by it’s self which is 100 so then you do 100 blocks.