We can arrange dots in a similar way to the 5 on a dice and they usually sit quite well into a rectangular shape. How many altogether in this 3 by 5? What happens for other sizes?
Button-up Some More
Age 7 to 11 Challenge Level:
How do you know you have found all the ways?
How could you use the number of ways to button up three buttons to
help you work out the number of ways for four buttons?
How will you record what you're doing?
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.