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 7
Challenge Level
Can you spot the mistake in this video? How would you work out the answer to this calculation?
Tumbling Down
Age 7 to 11
Challenge Level
Watch this animation. What do you see? Can you explain why this happens?
Eightness of Eight
Age 5 to 7
Challenge 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 11
Challenge Level
What do you think is going to happen in this video clip? Are you surprised?
Subtraction Surprise
Age 7 to 14
Challenge Level
Try out some calculations. Are you surprised by the results?
Perimeter Possibilities
Age 11 to 14
Challenge Level
I'm thinking of a rectangle with an area of 24. What could its perimeter be?
That Number Square!
Age 5 to 11
Challenge 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 14
Challenge 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 7
Challenge 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 11
Challenge 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 11
Challenge Level
Dotty Six is a simple dice game that you can adapt in many ways.
How Many?
Age 5 to 7
Challenge 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 11
Challenge 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 14
Challenge Level
Take a look at the video and try to find a sequence of moves that will untangle the ropes.
Method in Multiplying Madness?
Age 7 to 14
Challenge Level
Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?
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?
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?
Seven Squares - Group-worthy Task
Age 11 to 14
Challenge 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?
Take Three from Five
Age 11 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?
Counting Cards
Age 7 to 11
Challenge 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?
Shopping Basket
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?
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?
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.
Summing Consecutive Numbers
Age 11 to 14
Challenge 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 11
Challenge Level
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
Unexpected Ordering
Age 5 to 7
Challenge 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 11
Challenge 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 11
Challenge Level
Watch this animation. What do you notice? What happens when you try more or fewer cubes in a bundle?
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?
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...
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?
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?
Roll over the Dice
Age 7 to 11
Challenge 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 18
Challenge 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...
Dotty Six for Two
Age 5 to 11
Challenge 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 11
Challenge 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 14
Challenge Level
Play this game to learn about adding and subtracting positive and negative numbers
Strange Bank Account
Age 11 to 14
Challenge Level
Imagine a very strange bank account where you are only allowed to do two things...
Tasks Promoting Inquiry
Age 11 to 18
Challenge Level
Video for teachers of a talk given by Dan Meyer in Cambridge in March 2013.
NRICH is part of the family of activities in the Millennium Mathematics Project.