Lee was writing all the counting numbers from 1 to 20. She stopped for a rest after writing seventeen digits. What was the last number she wrote?
Age 5 to 7 Challenge Level:
Experiment with the interactivity, or make your own version using
card (see instructions in the
Can you imagine what each thing looks like before you try to make
You might want to find a book, or look at a door handle, for
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.