# Resources tagged with: Video

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### There are 41 results

Broad Topics > Physical and Digital Manipulatives > Video

### Speedy Summations

##### Age 16 to 18 Challenge Level:

Watch the video to see how to add together an arithmetic sequence of numbers efficiently.

### Summing Geometric Progressions

##### Age 14 to 18 Challenge Level:

Watch the video to see how to sum the sequence. Can you adapt the method to sum other sequences?

### The ELISA Test

##### Age 14 to 18 Challenge Level:

In 1% of cases, an HIV test gives a positive result for someone who is HIV negative. How likely is it that someone who tests positive has HIV?

### Vanishing Roots

##### Age 14 to 18

If $y=x^2-6x+c$, and we vary $c$, what happens to the roots when $c>9$?

### Sketching Graphs - Transformations

##### Age 16 to 18 Challenge Level:

If you can sketch y=f(x), there are several related functions you can also sketch...

### How to Sketch Graphs

##### Age 11 to 18 Challenge Level:

Video for teachers of a talk given by Dan Meyer in Cambridge in March 2013.

### Probability in Court

##### Age 14 to 18 Challenge Level:

When you're on trial for murder, it can be crucial that the court understands probability...

### Slick Summing

##### Age 14 to 16 Challenge Level:

Watch the video to see how Charlie works out the sum. Can you adapt his method?

### Kingsfield School - Building on Rich Starting Points

##### Age 5 to 18

Alf and Tracy explain how the Kingsfield School maths department use common tasks to encourage all students to think mathematically about key areas in the curriculum.

### Impossible Square?

##### Age 16 to 18 Challenge Level:

Can you make a square from these triangles?

### Impossible Triangles?

##### Age 16 to 18 Challenge Level:

Which of these triangular jigsaws are impossible to finish?

### Symmetric Tangles

##### Age 14 to 16

The tangles created by the twists and turns of the Conway rope trick are surprisingly symmetrical. Here's why!

### Power Countdown

##### Age 14 to 16 Challenge Level:

In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.

### Sorted

##### Age 14 to 18 Challenge Level:

How can you quickly sort a suit of cards in order from Ace to King?

### A Brief Introduction to Complex Numbers

##### Age 14 to 18 Challenge Level:

In this problem, we define complex numbers and invite you to explore what happens when you add and multiply them.

### James's Code Challenge

##### Age 7 to 18 Challenge Level:

The Enigma Project's James Grime has created a video code challenge. Watch it here!

### Angle Trisection

##### Age 14 to 16 Challenge Level:

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

### Beelines

##### Age 14 to 16 Challenge Level:

Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?

### Air Nets

##### Age 7 to 18 Challenge Level:

Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.

##### Age 14 to 16 Challenge Level:

Can you find out what is special about the dimensions of rectangles you can make with squares, sticks and units?

### How Risky Is My Diet?

##### Age 11 to 16 Challenge Level:

Newspapers said that eating a bacon sandwich every day raises the risk of bowel cancer by 20%. Should you be concerned?

### Take Three from Five

##### Age 14 to 16 Challenge Level:

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?

##### Age 11 to 16 Challenge Level:

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

##### Age 14 to 16 Challenge Level:

A picture is made by joining five small quadrilaterals together to make a large quadrilateral. Is it possible to draw a similar picture if all the small quadrilaterals are cyclic?

### The Invertible Trefoil

##### Age 14 to 16 Challenge Level:

When is a knot invertible ?

### Galley Division

##### Age 14 to 16 Challenge Level:

Can you explain how Galley Division works?

### Drawing Squares

##### Age 11 to 16

Take a look at the video showing squares drawn on dotty grids...

### Statins and Risk

##### Age 14 to 16 Challenge Level:

"Statins cut the risks of heart attacks and strokes by 40%"
Should the Professor take statins? Can you help him decide?

### Drawing Rhombuses

##### Age 11 to 16

Take a look at the video showing rhombuses drawn on dotty grids...

### Areas on a Grid

##### Age 11 to 16

Take a look at the video showing areas of different shapes on dotty grids...

### Squares from Diagonals

##### Age 11 to 16

Take a look at the video showing squares and their diagonals...

### Introductory Video

##### Age 11 to 16

An introductory video to the Probability and Evidence collection

### Rhombuses from Diagonals

##### Age 11 to 16

Take a look at the video showing rhombuses and their diagonals...

### Painted Cube

##### Age 14 to 16 Challenge Level:

Imagine a large cube made from small red cubes being dropped into a pot of yellow paint. How many of the small cubes will have yellow paint on their faces?

### Whirlyball

##### Age 16 to 18 Challenge Level:

Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?

### The Best Card Trick?

##### Age 11 to 16 Challenge Level:

Time for a little mathemagic! Choose any five cards from a pack and show four of them to your partner. How can they work out the fifth?

### Modular Origami Polyhedra

##### Age 7 to 16 Challenge Level:

These models have appeared around the Centre for Mathematical Sciences. Perhaps you would like to try to make some similar models of your own.

### Turning the Place Over

##### Age 11 to 18 Challenge Level:

As part of Liverpool08 European Capital of Culture there were a huge number of events and displays. One of the art installations was called "Turning the Place Over". Can you find our how it works?

### Helicopters

##### Age 7 to 16 Challenge Level:

Design and test a paper helicopter. What is the best design?