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N Is a Number

Age 11 to 14
Challenge Level Yellow starYellow starYellow star
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This problem does not need algebra.

Is N odd or even?
How long do the walkers take to reach B?
How large can N be?


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Paradoxes

A paradox is a statement that seems to be both untrue and true at the same time. This article looks at a few examples and challenges you to investigate them for yourself.

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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.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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