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Curious number
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Curious Number

7 to 11

Can you order the digits from 1-3 to make a number which is divisible by 3 so when the last digit is removed it becomes a 2-figure number divisible by 2, and so on?

Learning Mathematics Through Games Series: 4. From Strategy Games
article

Learning Mathematics Through Games Series: 4. From Strategy Games

5 to 14

Basic strategy games are particularly suitable as starting points for investigations. Players instinctively try to discover a winning strategy, and usually the best way to do this is to analyse the outcomes of series of 'moves'. With a little encouragement from the teacher, a mathematical investigation is born.

Is your DNA unique?
problem

Is Your DNA Unique?

16 to 18

Use combinatoric probabilities to work out the probability that you are genetically unique!

The yellow NRICH logo above the words 'Early Years', on a turquoise background.
article

Children's Thinking

3 to 5

Dr Sue Gifford outlines different ways in which you might capture young children's mathematical thinking and how to send samples to NRICH.

Pentagon Construction
problem

Pentagon Construction

16 to 18
Follow the instructions to create a regular pentagon. Can you prove it is indeed regular?
Platonic Planet
problem

Platonic Planet

14 to 16
Glarsynost lives on a planet whose shape is that of a perfect regular dodecahedron. Can you describe the shortest journey she can make to ensure that she will see every part of the planet?
Drug stabiliser
problem

Drug Stabiliser

16 to 18
How does the half-life of a drug affect the build up of medication in the body over time?
3D Treasure Hunt
problem

3D Treasure Hunt

14 to 18

Some treasure has been hidden in a three-dimensional grid! Can you work out a strategy to find it as efficiently as possible?

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