problem
Favourite
Up and Down Staircases
Age
7 to 11
Challenge level
One block is needed to make an up-and-down staircase, with one step up and one step down. How many blocks would be needed to build an up-and-down staircase with 5 steps up and 5 steps down?
problem
Favourite
Brush Loads
Age
7 to 11
Challenge level
How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.
problem
Cubes Here and There
Age
7 to 11
Challenge level
How many shapes can you build from three red and two green cubes? Can you use what you've found out to predict the number for four red and two green?
problem
Favourite
Picture a Pyramid
Age
7 to 11
Challenge level
Imagine a pyramid which is built in square layers of small cubes. If we number the cubes from the top, starting with 1, can you picture which cubes are directly below this first cube?
