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Resources to accompany Charlie's workshops and presentation.

Explore a task from our Wild site on each day in the run up to Christmas

A collection of short Stage 3 and 4 problems on Reasoning, Justifying, Convincing and Proof.

We have been exploring what mastering mathematics in the context of problem solving means to us at NRICH.

Resources to accompany NRICH team presentations at UKMT 2015 Teacher Meetings.

NQT Inspiration Day: Nurturing Creative Problem Solvers - Summer 2015 event in Cambridge

A collection of short Stage 3 and 4 problems on Thinking Strategically.

A collection of short Stage 3 and 4 problems on Working Systematically.

Develop your skills of visualisation of mathematical objects

A collection of short Stage 3 and 4 problems on Visualising.

Details about free CPD events in June and July 2015.

Resources to accompany Charlie's workshop at the Prince's Teaching Institute's Residential Summer School in Cambridge.

Resources to accompany Tabitha's and Charlie's workshops at the Prince's Teaching Institute's New Teacher Days.

A collection of short Stage 3 and 4 problems on Representing.

Resources to accompany Fran's and Charlie's workshops at the ATM & MA Easter Conferences.

A collection of short problems on area and volume.

The scale on a piano does something clever : the ratio (interval) between any adjacent points on the scale is equal. If you play any note, twelve points higher will be exactly an octave on.

Resources to accompany Charlie's 2015 presentation at PLT Day in Devonport High School for Boys.

Chris and Jo put two red and four blue ribbons in a box. They each pick a ribbon from the box without looking. Jo wins if the two ribbons are the same colour. Is the game fair?

How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?

Can you use small coloured cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of each colour?

Three people chose this as a favourite problem. It is the sort of problem that needs thinking time - but once the connection is made it gives access to many similar ideas.

Caroline and James pick sets of five numbers. Charlie chooses three of them that add together to make a multiple of three. Can they stop him?

Which of these games would you play to give yourself the best possible chance of winning a prize?

There is a particular value of x, and a value of y to go with it, which make all five expressions equal in value, can you find that x, y pair ?

The items in the shopping basket add and multiply to give the same amount. What could their prices be?

The Tower of Hanoi is an ancient mathematical challenge.

A collection of short problems on creating algebraic expressions.

Can you find a general rule for finding the areas of equilateral triangles drawn on an isometric grid?

Lyndon chose this as one of his favourite problems. It is accessible but needs some careful analysis of what is included and what is not. A systematic approach is really helpful.

Which has the greatest area, a circle or a square inscribed in an isosceles, right angle triangle?

A visualisation problem in which you search for vectors which sum to zero from a jumble of arrows. Will your eyes be quicker than algebra?

Match the cumulative frequency curves with their corresponding box plots.

Can you explain the surprising results Jo found when she calculated the difference between square numbers?

It is impossible to trisect an angle using only ruler and compasses but it can be done using a carpenter's square.

If a sum invested gains 10% each year how long before it has doubled its value?

If the hypotenuse (base) length is 100cm and if an extra line splits the base into 36cm and 64cm parts, what were the side lengths for the original right-angled triangle?

How good are you at finding the formula for a number pattern ?

If you were to set the X weight to 2 what do you think the angle might be?

There are lots of different methods to find out what the shapes are worth - how many can you find?

Ask a friend to choose a number between 1 and 63. By identifying which of the six cards contains the number they are thinking of it is easy to tell them what the number is.

Have a go at creating these images based on circles. What do you notice about the areas of the different sections?

Are you at risk of being a victim of crime? How does your perception of that risk compare with the facts and figures?

Weekly Problem 36 - 2007

Find the length along the shortest path passing through certain points on the cube.

The diagonals of a trapezium divide it into four parts. Can you create a trapezium where three of those parts are equal in area?

I took the graph y=4x+7 and performed four transformations. Can you find the order in which I could have carried out the transformations?

In 15 years' time my age will be the square of my age 15 years ago. Can you work out my age, and when I had other special birthdays?