The problems and games in this feature will challenge you to visualise quadrilaterials.

In this feature there are 4 problems based on STEP questions, all of which involve number theory.

In this feature we are exploring and proving some results about tetrahedrons.

In this feature we are presenting problems with a festive twist.

In this feature we are exploring and proving some results about tetrahedrons.

In this feature, we challenge you to solve our Mathdokus, a mathematical variation of the well-known Sudoku

In this feature you will be challenged to derive elegant and efficient solutions to problems which, at first sight, might seem very difficult.

We hope that these problems will help you appreciate that algebra can be a versatile tool for solving a range of problems.

This feature will introduce the symbols $\implies$ and $\iff$ and challenge you to reason logically and create true statements using these symbols.

In this feature you are invited to explore a variety of problems, and are then asked to construct convincing arguments to explain what you have discovered.

The problems in this feature offer you the chance to explore geometrical properties, and then challenge you to create clear, rigorous proofs.

The problems in this feature offer you the chance to explore geometrical properties, make conjectures and create proofs to show that these are always true.

The problems in this feature challenge you to create convincing arguments or "proofs", and to identify where the logic breaks down in some "dodgy proofs".

The problems in this feature offer you the chance to identify number patterns, make conjectures and create convincing mathematical proofs.

The problems in this feature will encourage you to explore the impact that your lifestyle choices have on the environment.

The problems in this feature will allow you to explore the impact of lifestyle choices and help you gain a better understanding of the contributors to global emissions.

The resources in this feature introduce you to the world of networks and graph theory.

The resources in this feature have been designed to give you an introduction to the world of graph theory and networks, and to their applications.

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This collection of activities offers you a variety of playful contexts in which you will be challenged to plan ahead and analyse the outcomes.

This collection of activities offers you a variety of playful contexts in which you will be challenged to plan ahead and analyse the outcomes.

The problems in this feature will give you the chance to investigate the properties of numbers in a variety of contexts.

Enter the world of modular arithmetic and discover the secrets of public key cryptography.

This feature introduces you to number theory, a rich source of interesting problems which can lead to surprising results.

Number theory is a rich source of interesting problems which can lead to surprising results.

A chance to consider the equations of straight line graphs before moving on to consider the properties of quadratics and cubics.

Curve sketching can be a very useful tool when you are solving equations or inequalities.

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Probability can help you make better choices and challenge commonly-held misconceptions.

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The problems in this feature challenge you to explore different ways of arriving at a solution

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What makes a good mathematician? This feature will help you to build your mathematical muscles.

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A chance to compare numbers expressed in different ways, and to use these different representations in calculations.

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Use Cuisenaire rods to help you visualise patterns and relationships with numbers

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Explore these problems and explain the mathematical ideas you discover!

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Working backwards can help you to make great leaps forwards!

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These problems can be represented in many different ways!

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Find out about Complex Numbers and their applications.

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These problems will make you say "I wonder what happens if...?"

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If you know the output, how can you work out the input?

What if we could find the square root of negative numbers?

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We hope you enjoy being mathematically playful with these puzzling problems.

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This feature explores problems connected with area and integration

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These problems invite you to think about area in unusual ways.

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Resources to help you think about calculus and transformations

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Some mathematical results can be proved beautifully with just a simple diagram...

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These resources explore probability in medicine and the law.

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Explore how to use statistics and probability to make informed decisions

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These CMEP resources explore the use of trigonometric identities and other trig features

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Problems to help you get started with higher mathematics courses

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Be playful with graphs and networks, and see what theorems you can discover!

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Be playful with polygons. What patterns can you find?

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These resources from CMEP explore some aspects of differentiation and integration

In this feature, explore what happens to functions when you transform their graphs

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This CMEP feature explores the properties of circles and triangles

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Explore some shape problems and make some discoveries!

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Try some of our CMEP resources around the theme of logarithms.

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Explore and sketch curves with different properties.

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Try our new CMEP tasks to help you to think functionally!

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Who would have thought that addition could be so intriguing?

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Try some of our CMEP resources around the theme of quadratics.

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This feature introduces some topics from Decision Mathematics

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You can get a great feel for functions by sketching their graphs or using graph plotting software...

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What advanced mathematics can you do on a dotty grid?

What stories do complicated data sets tell us? How can we present the information clearly?

By exploring these problems you'll gain a greater appreciation of the importance of place value.

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.

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

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