This big box multiplies anything that goes inside it by the same number. If you know the numbers that come out, what multiplication might be going on in the box?
Age 7 to 11 Challenge Level:
Pick two cogs in the interactivity below, place them near each other and turn one of them.
(You can turn a selected cog by using the arrow keys on your keyboard or by using the green arrows on the interactivity.)
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.