Place four pebbles on the sand in the form of a square. Keep adding as few pebbles as necessary to double the area. How many extra pebbles are added each time?
Stage: 2 Challenge Level:
You could draw the shapes on squared paper or isometric paper and cut out the smaller ones to fit into the larger ones.
Or you could print these sheets and cut out the shapes.
Don't forget you can rotate the smaller shapes!
The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the
NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to
embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities
can be found here.