Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
Age 5 to 7 Challenge Level:
If a weight on the $10$ hook balances with a weight on the $2$ hook
together with a weight on the $8$ hook, can you see how the balance
How can you tell from the pictures or interactivity which side is
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.