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There are 79 NRICH Mathematical resources connected to Video, you may find related items under Physical and digital manipulatives.
Broad Topics > Physical and digital manipulatives > VideoCan you spot the mistake in this video? How would you work out the answer to this calculation?
Watch this animation. What do you see? Can you explain why this happens?
What do you see as you watch this video? Can you create a similar video for the number 12?
What do you think is going to happen in this video clip? Are you surprised?
Try out some calculations. Are you surprised by the results?
Play this game to learn about adding and subtracting positive and negative numbers
Imagine a very strange bank account where you are only allowed to do two things...
I'm thinking of a rectangle with an area of 24. What could its perimeter be?
Watch these videos to see how Phoebe, Alice and Luke chose to draw 7 squares. How would they draw 100?
Generate three random numbers to determine the side lengths of a triangle. What triangles can you draw?
Watch the video to see how to sum the sequence. Can you adapt the method to sum other sequences?
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?
Can you find out what is special about the dimensions of rectangles you can make with squares, sticks and units?
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 is a simple dice game that you can adapt in many ways.
Move your counters through this snake of cards and see how far you can go. Are you surprised by where you end up?
Think of a two digit number, reverse the digits, and add the numbers together. Something special happens...
This project challenges you to work out the number of cubes hidden under a cloth. What questions would you like to ask?
Watch the video to see how Charlie works out the sum. Can you adapt his method?
Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.
In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.
Take a look at the video and try to find a sequence of moves that will untangle the ropes.
Watch our videos of multiplication methods that you may not have met before. Can you make sense of them?
Whirl a conker around in a horizontal circle on a piece of string. What is the smallest angular speed with which it can whirl?
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?
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?
Caroline and James pick sets of five numbers. Charlie tries to find three that add together to make a multiple of three. Can they stop him?
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?
How many moves does it take to swap over some red and blue frogs? Do you have a method?
This is an adding game for two players. Can you be the first to reach the target?
Can you work out how to win this game of Nim? Does it matter if you go first or second?
The items in the shopping basket add and multiply to give the same amount. What could their prices be?
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
It is impossible to trisect an angle using only ruler and compasses but it can be done using a carpenter's square.
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?
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.
These models have appeared around the Centre for Mathematical Sciences. Perhaps you would like to try to make some similar models of your own.
Watch the video to see how to add together an arithmetic sequence of numbers efficiently.
Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.
Which of these triangular jigsaws are impossible to finish?
Can you picture how to order the cards to reproduce Charlie's card trick for yourself?
The tangles created by the twists and turns of the Conway rope trick are surprisingly symmetrical. Here's why!
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?
In this game for two players, take it in turns to shade one petal, or two petals next to each other. Is it better to go first or second?
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?