# Resources tagged with: Video

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There are 80 NRICH Mathematical resources connected to Video, you may find related items under Physical and Digital Manipulatives.

Broad Topics > Physical and Digital Manipulatives > Video

### Subtraction Slip

##### Age 5 to 7Challenge Level

Can you spot the mistake in this video? How would you work out the answer to this calculation?

### Tumbling Down

##### Age 7 to 11Challenge Level

Watch this animation. What do you see? Can you explain why this happens?

### Eightness of Eight

##### Age 5 to 7Challenge Level

What do you see as you watch this video? Can you create a similar video for the number 12?

### Pouring Problem

##### Age 7 to 11Challenge Level

What do you think is going to happen in this video clip? Are you surprised?

### Subtraction Surprise

##### Age 7 to 14Challenge Level

Try out some calculations. Are you surprised by the results?

### Perimeter Possibilities

##### Age 11 to 14Challenge Level

I'm thinking of a rectangle with an area of 24. What could its perimeter be?

### That Number Square!

##### Age 5 to 11Challenge Level

Exploring the structure of a number square: how quickly can you put the number tiles in the right place on the grid?

### Seven Squares

##### Age 11 to 14Challenge Level

Watch these videos to see how Phoebe, Alice and Luke chose to draw 7 squares. How would they draw 100?

### All Change

##### Age 5 to 7Challenge Level

There are three versions of this challenge. The idea is to change the colour of all the spots on the grid. Can you do it in fewer throws of the dice?

### Bryony's Triangle

##### Age 7 to 11Challenge Level

Watch the video to see how to fold a square of paper to create a flower. What fraction of the piece of paper is the small triangle?

### Dotty Six

##### Age 5 to 11Challenge Level

Dotty Six is a simple dice game that you can adapt in many ways.

### How Many?

##### Age 5 to 7Challenge Level

This project challenges you to work out the number of cubes hidden under a cloth. What questions would you like to ask?

### Strike it Out

##### Age 5 to 11Challenge Level

Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

### Twisting and Turning

##### Age 11 to 14Challenge Level

Take a look at the video and try to find a sequence of moves that will untangle the ropes.

##### Age 7 to 14Challenge Level

Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?

### Whirlyball

##### Age 16 to 18Challenge 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?

### Painted Cube

##### Age 14 to 16Challenge 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?

### Seven Squares - Group-worthy Task

##### Age 11 to 14Challenge Level

Choose a couple of the sequences. Try to picture how to make the next, and the next, and the next... Can you describe your reasoning?

### Amazing Card Trick

##### Age 11 to 14Challenge Level

How is it possible to predict the card?

### Take Three from Five

##### Age 11 to 16Challenge 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?

### Counting Cards

##### Age 7 to 11Challenge Level

A magician took a suit of thirteen cards and held them in his hand face down. Every card he revealed had the same value as the one he had just finished spelling. How did this work?

### Totality

##### Age 5 to 11Challenge Level

This is an adding game for two players.

##### Age 11 to 16Challenge Level

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

### Beelines

##### Age 14 to 16Challenge Level

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

### Angle Trisection

##### Age 14 to 16Challenge Level

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

### Summing Consecutive Numbers

##### Age 11 to 14Challenge Level

15 = 7 + 8 and 10 = 1 + 2 + 3 + 4. Can you say which numbers can be expressed as the sum of two or more consecutive integers?

### Surprising Split

##### Age 7 to 11Challenge Level

Does this 'trick' for calculating multiples of 11 always work? Why or why not?

### Unexpected Ordering

##### Age 5 to 7Challenge Level

Watch the video of Fran re-ordering these number cards. What do you notice? Try it for yourself. What happens?

### Truth or Lie

##### Age 7 to 11Challenge Level

Take a look at the video of this trick. Can you perform it yourself? Why is this maths and not magic?

### Bundles of Cubes

##### Age 7 to 11Challenge Level

Watch this animation. What do you notice? What happens when you try more or fewer cubes in a bundle?

### Maths for Parents 2017

Resources from Charlie's and Fran's 2017 Madingley course for parents.

### Vanishing Roots

##### Age 14 to 18

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

### Introductory Video

##### Age 11 to 16

An introductory video to the Probability and Evidence collection

### The ELISA Test

##### Age 14 to 18Challenge 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?

### Probability in Court

##### Age 14 to 18Challenge Level

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

### Statins and Risk

##### Age 14 to 16Challenge Level

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

### How Risky Is My Diet?

##### Age 11 to 16Challenge Level

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

### Roll over the Dice

##### Age 7 to 11Challenge Level

Watch this video to see how to roll the dice. Now it's your turn! What do you notice about the dice numbers you have recorded?

### Sketching Graphs - Transformations

##### Age 16 to 18Challenge Level

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

### Areas on a Grid

##### Age 11 to 16

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

### Rhombuses from Diagonals

##### Age 11 to 16

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

### Drawing Rhombuses

##### Age 11 to 16

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

### Squares from Diagonals

##### Age 11 to 16

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

### Drawing Squares

##### Age 11 to 16

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

### Dotty Six for Two

##### Age 5 to 11Challenge Level

Dotty Six game for an adult and child. Will you be the first to have three sixes in a straight line?

### Strike it Out for Two

##### Age 5 to 11Challenge Level

Strike it Out game for an adult and child. Can you stop your partner from being able to go?

### Up, Down, Flying Around

##### Age 11 to 14Challenge Level

Play this game to learn about adding and subtracting positive and negative numbers

### Strange Bank Account

##### Age 11 to 14Challenge Level

Imagine a very strange bank account where you are only allowed to do two things...