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Maze 100

Can you go through this maze so that the numbers you pass add to exactly 100?

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Watch Your Feet

I like to walk along the cracks of the paving stones, but not the outside edge of the path itself. How many different routes can you find for me to take?

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Delia's Routes

A little mouse called Delia lives in a hole in the bottom of a tree.....How many days will it be before Delia has to take the same route again?

Rail Network

Stage: 2 Challenge Level: Challenge Level:1

This drawing shows the train track joining the Train Yard to all the stations labelled from A to S.

Find a way for a train to call at all the stations and return to the Yard.


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. More information on many of our other activities can be found here.
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NRICH is part of the family of activities in the Millennium Mathematics Project.