Donald plays with his wood cubes and decides to make pyramids. He carries on with his pyramids and labels following the same pattern. After making p4, Donald realises that he only has 12 wood cubes left. How many more cubes will he need to make p5? Work out the number of cubes needed to make p10 - FIND PICTURE BELOW

a) 9

Step-by-step explanation:

Draw out or imagine the next set of pyramids. If P1 has 2 blocks on the bottom and P2 has 3 blocks, that means that if you follow the pattern, P4 will have 5 blocks on the bottom so just add 5 to the amount of blocks in P3. To make P5, just add 6 blocks onto the amount of blocks in P4 that you just made. Hope this helps, I am not very good at explaining. I don't know the answer to 'b' as I am struggling with it as well.