Or search by topic
This activity is about imagining a picture in your head. You will probably have to write some numbers down, but try not to draw anything.
What numbered cubes are vertically underneath (in a straight line):
Now imagine stepping up two layers at a time, starting at the middle cube on the South side, second layer up. Which numbered cubes would you step on to end at the top, if you stepped up in a straight line?
Starting at the South West Corner and stepping up one layer at a time on the corner steps, which numbered cubes would you step on?
What if a second pyramid was built, numbering the cubes as they built the pyramid, so the numbering would start from the bottom North West corner and starting the second row as before.
So number 1 at the bottom and the last cube number 91.
What numbered cubes are vertically underneath (in a straight line):
Is there a cube that has the same number in both pyramids?
What was the difference for you in doing the second pyramid compared with doing the first pyramid?