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Mathematical reasoning & proof. Angular Motion. Logic. Video. Programming. Algorithms. Summation of series. Combinatorics. Rational and irrational numbers. Codes and cryptography.There are 27 results
Broad Topics > Information and Communications Technology > Video
James's Code Challenge
Stage: 2, 3, 4 and 5 Challenge Level: 
The Enigma Project's James Grime has created a video code challenge. Watch it here!
The Best Card Trick?
Stage: 3 and 4 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?
A Brief Introduction to Complex Numbers
Stage: 4 and 5 Challenge Level:
In this problem, we define complex numbers and invite you to explore what happens when you add and multiply them.
Introduction to Number Plumber
Stage: 2, 3, 4 and 5 Challenge Level:
Video showing how to use the Number Plumber
Factorising with Multilink
Stage: 4 Challenge Level:
Can you find out what is special about the dimensions of rectangles you can make with squares, sticks and units?
Slick Summing
Stage: 4 Challenge Level:
Watch the video to see how Charlie works out the sum. Can you adapt his method?
Impossible Triangles?
Stage: 5 Challenge Level:
Which of these triangular jigsaws are impossible to finish?
Summing Geometric Progressions
Stage: 4 and 5 Challenge Level:
Watch the video to see how to sum the sequence. Can you adapt the method to sum other sequences?
Turning the Place Over
Stage: 3, 4 and 5 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?
Symmetric Tangles
Stage: 4
The tangles created by the twists and turns of the Conway rope trick are surprisingly symmetrical. Here's why!
Speedy Summations
Stage: 5 Challenge Level:
Watch the video to see how to add together an arithmetic sequence of numbers efficiently.
Plaited Origami Polyhedra
Stage: 2, 3 and 4 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.
Beelines
Stage: 4 Challenge Level:
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
Alison's Mapping
Stage: 4 Challenge Level:
Alison has created two mappings. Can you figure out what they do? What questions do they prompt you to ask?
Air Nets
Stage: 2, 3, 4 and 5 Challenge Level:
Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.
Power Countdown
Stage: 4 Challenge Level:
In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.
Steve's Mapping
Stage: 5 Challenge Level:
Steve has created two mappings. Can you figure out what they do? What questions do they prompt you to ask?
Whirlyball
Stage: 5 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?
Cyclic Quad Jigsaw
Stage: 4 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?
Take Three from Five
Stage: 4 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?
Kingsfield School - Building on Rich Starting Points
Stage: 1, 2, 3, 4 and 5
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.
Helicopters
Stage: 2, 3 and 4 Challenge Level:
Design and test a paper helicopter. What is the best design?
NRICH is part of the family of activities in the Millennium Mathematics Project.