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?
Through the Window
Age 7 to 11 Challenge Level
Are there any windows that use the same amount of glass? How do their frame lengths differ?
Are there any windows that use the same amount of frame? How do their glass areas differ?
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.