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Number and algebra

  • The Number System and Place Value
  • Calculations and Numerical Methods
  • Fractions, Decimals, Percentages, Ratio and Proportion
  • Properties of Numbers
  • Patterns, Sequences and Structure
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Geometry and measure

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Probability and statistics

  • Handling, Processing and Representing Data
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Working mathematically

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Advanced mathematics

  • Decision Mathematics and Combinatorics
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For younger learners

  • Early Years Foundation Stage

Dynamic Explorations

Dynamic Explorations

Mathematicians often use tools to help them to make discoveries. The problems in this feature encourage you to use dynamic geometry and other interactive tools to explore, pose questions, make conjectures and prove ideas.

Polygon Rings 
Age 11 to 14
Challenge Level Yellow star

Join pentagons together edge to edge. Will they form a ring?

Shifting Times Tables 
Age 11 to 14
Challenge Level Yellow star

Can you find a way to identify times tables after they have been shifted up or down?

Semi-regular Tessellations 
Age 11 to 16
Challenge Level Yellow star

Semi-regular tessellations combine two or more different regular polygons to fill the plane. Can you find all the semi-regular tessellations?

Using Geogebra 
Age 11 to 18

Never used GeoGebra before? This article for complete beginners will help you to get started with this free dynamic geometry software.

Quad in Quad 
Age 14 to 18
Challenge Level Yellow starYellow star

Join the midpoints of a quadrilateral to get a new quadrilateral. What is special about it?

Surprising Equalities 
Age 14 to 18
Challenge Level Yellow starYellow star

Take any triangle, and construct squares on each of its sides. What do you notice about the areas of the new triangles formed?

Pentagon Construction 
Age 16 to 18
Challenge Level Yellow starYellow starYellow star

Follow the instructions to create a regular pentagon. Can you prove it is indeed regular?

Fantastic Fractals 
Age 11 to 18

In this article from Plus, read about how computers help mathematicians to make discoveries in fractal dimensions!

Related

  • Journeys of Discovery
  • Interactivities to Make You Inquisitive

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Patterns in Number Sequences

These resources are designed to get you thinking about number sequences and patterns.

Secondary Student Latest

Latest list for the Lower Secondary Student page

Curriculum Topics

Problems organised by curriculum topic for lower secondary students.

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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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