Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
Age 7 to 14 Challenge Level
You can print out dotty paper from our Printable Resources page if you would like to draw your triangles on a square grid.
The prompts in the problem offer useful suggestions if you are stuck.
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.