How many noughts are at the end of these giant numbers?
Age 14 to 16 Challenge Level:
This one was a tough problem! Some of you
started to spot patterns and suggested possible rules, but the
patterns didn't continue. In fact, a general rule for this sequence
is pretty hard to write down! One very useful way of
recording the number of walks of up to eight steps was
Can you see how the diagram works? Could
you continue it to find the number of ten-step walks?
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.