Teddy Town : nrich.maths.orgIn Teddy Town , teddies are either red or yellow and they live in red or yellow
houses. There are 4 teddies - 2 red and 2 yellow, and 4 houses - 2 red and 2
yellow ... Teddy Town - Games - Visualising - Compare bears

Is it Magic or Is it Maths ? : nrich. maths .orgHere are three ' tricks ' to amaze your friends. But the really clever trick is
explaining to them why these ' tricks ' are maths not magic. Like all good
magicians, you ...

Home Page : nrich .maths.orgThe Nrich Maths Project Cambridge,England. Mathematics resources for children
,parents and teachers to enrich learning. Problems,children's solutions

Living in the matrix ? | plus.maths.orgIt's something that most of us dread: to find out one day that we aren't real, that we
are living in a computer simulation. Yet some people who ...

Plus MagazineWelcome to Plus magazine ! In the game of Nim one player always has a winning
strategy — it depends on a weird way of adding binary numbers. Play to win ... Articles - Puzzles - Packages - Ebooks!

Shapes in a Grid : nrich.maths.orgCan you find which shapes you need to put into the grid to make the totals at the
end of each row and the bottom of each column?

Gifted and Talented - Nrich - Millennium Mathematics ProjectMaths in the Undergraduate Physical Sciences. Stage: 5. An article about the
kind of maths a first year undergraduate in physics, engineering and other
physical ...

The Use of Mathematics in Computer Games : nrich. maths .orgAn account of how mathematics is used in computer games including ... The First
Person Shooter (FPS) is a type of game where you run around 3D levels ... Calculus generally - Mathematical modelling - Biology - Vectors

Home Page : nrich. maths .orgMathematics resources for children,parents and teachers to enrich learning.
Problems,children's solutions,interactivities, games ,articles,news.

First Forward Into Logo 5: Pen Up , Pen Down : nrich.maths.orgLearn about Pen Up and Pen Down in Logo . ... Procedures allow you to save
instructions in LOGO , creating primitives of your own, which you can use ...

Mysterious number 6174 | plus.maths.orgAnyone can uncover the mystery . The number 6174 is a really mysterious
number . At first glance, it might not seem so obvious. But as we are ...

The Nrich Maths Project Cambridge,England. Mathematics resources for children
,parents and teachers to enrich learning. Problems,children's ... More information
on many of our other activities can be found here. Register for our mailing list.

Orange Drink : nrich .maths.org - Millennium Mathematics ProjectFirst I found out how much juice there is in each cup of drink . ... If you have a
750ml bottle of concentrated orange juice you can make 15 cups of juice. Each
cup ...

Home Page : nrich.maths.orgThe Nrich Maths Project Cambridge,England. Mathematics resources for children
,parents and teachers to enrich learning. Problems,children's solutions ...

'The Golden Section' | plus . maths .orgThe Golden Section. Hans Walser, trans. Peter Hilton . Mathematical Association
of America 2001. The golden section (or golden ratio), ...

Which voting system is best ? | plus.maths.orgWith the day of the referendum on the UK voting system drawing nearer, Tony ...
The good folk of Chuddlehampton have to elect their village ...

Imaging maths - Unfolding polyhedra | plus.maths.orgNot only do paper models of geometric shapes decorate the ceilings of the ....
Unfolding of Császár torus with JavaView's Unfolder applet.

Here are three ' tricks ' to amaze your friends. But the really clever trick is
explaining to them why these ' tricks ' are maths not magic . Like all good
magicians, you ...

A Brief History of Time Measurement : nrich.maths.orgNoticing the regular movement of the Sun and the stars has led to a desire to
measure time . This article for teachers and learners looks at the history of man's ...

Working Systematically - Lower Secondary : nrich. maths .orgWorking Systematically - Lower Secondary . Scroll down to see our complete
collection of problems that require you to work systematically, or explore the two ...

Ladder and Cube : nrich.maths.orgA 1 metre cube has one face on the ground and one face against a wall. A 4
metre ladder leans against the wall and just touches the cube . How high is the
top of ...

But the really clever trick is explaining to them why these 'tricks' are maths not
magic . Like all ... Try this with a different starting number . Did you ... Wow, Magic !

High Jumping : nrich. maths .orgHow can a high jumper jump higher without jumping higher? ... When an object
has a bendy shape it is possible for its centre of gravity to lie outside of the body.

Last One Standing : nrich.maths.orgPeople with heads flip again. Do you think anyone will get 6 heads in a row?
How many heads in a row do you expect the last one standing to have flipped?

Special Numbers : nrich.maths.orgMy two digit number is special because adding the sum of its digits to the product
of its digits gives me my original number . What could my number be?

9 Hole Light Golf : nrich.maths.orgThe NRICH Project aims to enrich the mathematical
experiences of all learners. To support this aim, members of the NRICH team
work in a ...

Running a lottery , for beginners | plus.maths.orgTo appreciate why Lottery formats are what they are, consider how you would
design an ongoing Lottery from scratch. Your aim is to maximise ...

Countdown : nrich.maths.orgHere is a chance to play a version of the classic Countdown Game . ... contains
the numbers 25, 50, 75, 100 and the bottom row contains numbers from 1 to 10.

Mathematical mysteries: The Barber's Paradox | plus.maths.orgI shave anyone who does not shave himself, and noone else. ... Just like the
barber who shaves himself, but mustn't, and therefore doesn't, and ...

Place Your Orders : nrich.maths.orgCan you rank these sets of quantities in order , from smallest to largest? Can you
provide convincing evidence for your rankings?

Games from Around the World : nrich.maths.orgHere are a collection of games from around the world to try during the holidays or
the last few weeks of term.

Pattern Power : nrich. maths .orgMathematics is the study of patterns . Studying pattern is an opportunity to
observe, hypothesise, experiment, discover and create.

Learn about Number Bases : nrich.maths.orgWe are accustomed to writing numbers in base ten, using the symbols for 0, 1, 2,
3, 4, 5, 6, 7, 8, and 9. For example, 75 means 7 tens and five units. However ...

Maths in a minute: Adding fractions (the easy way) | plus.maths.orgEasy ! Apparently this is how Vedic mathematicians in ancient India added up
fractions. If you happen to ... Science is much stranger than fiction.

The life and numbers of Fibonacci | plus.maths.orgFibonacci is one of the most famous names in mathematics. This would come as
a surprise to Leonardo Pisano, the mathematician we now ...

' Is God a mathematician ?' | plus.maths.orgThe question of whether god is a mathematician refers to the apparently
omnipotent powers of mathematics to describe the world we live in ...

Exotic spheres, or why 4-dimensional space is a crazy place | plus Of course we can continue this line of thought: 4-dimensional space , for a ... The
difference between the circle and the line is that when viewed ...

Interactive and Printable Resources : nrich.maths.orgThis page is no longer up-to-date. Please select one of the following links to find
our printable and interactive resources: General printable resources

The Secret World of Codes and Code Breaking : nrich.maths.orgWhen you think of spies and secret agents, you probably wouldn't think of
mathematics. Some of the most famous code breakers in history have been ...

The Nrich Maths Project Cambridge,England. Mathematics resources for children
,parents and teachers to enrich learning. Problems ,children's solutions ...

Developing Logical Thinking : the Place of Strategy Games : nrich This article outlines how strategy games can help children develop logical
thinking , using examples from the NRICH website.

Schrödinger's equation — what is it? | plus.maths.orgSchrödinger's equation is named after Erwin Schrödinger , 1887-1961. ... But in
1905 Einstein realised that the wave picture wasn't entirely ...

Getting the Balance : nrich.maths.orgIf you hang two weights on one side of this balance , in how many different ways
can you hang three weights on the other side for it to be balanced ?

How maths killed Lehman Brothers | plus.maths.orgThe housing market boom had turned Lehman Brothers from a modest ... "The
largest bankruptcy in the US history," as described by Wikipedia .

Magic Squares : nrich.maths.orgA basic introduction to magic squares can be found here . Magic squares have
intrigued people for thousands of years and in ancient times they were thought to
...

About Plus | plus . maths .orgWhat we do. Plus is an internet magazine which aims to introduce readers to the
beauty and the practical applications of mathematics. A lot of people don't have ...

Welcome to Plus magazine! In the game of Nim one player always has a winning
strategy — it depends on a weird way of adding binary numbers. Play to win ...

Analemmatic sundials : How to build one and why they work | plus An analemmatic sundial is a particular kind of horizontal sundial in which the
shadow-casting object is vertical, and is moved depending on the date, or to be ...

The Money Maze : nrich.maths.orgGo through the maze , collecting and losing your money as you go. Which route
gives you the highest return? And the lowest?

Compass directions and bearings - Nrich - Millennium Mathematics Mathematics resources for children,parents and teachers to enrich learning. ...
Topics > 2D Geometry, Shape and Space > Compass directions and bearings .

The art of numbers | plus.maths.orgIt's not unheard of for mathematicians and artists to look at each other with
suspicion, and yet numerical relationships underly much form in art ...

Method in Multiplying Madness? : nrich.maths.orgWatch our videos of multiplication methods that you may not have met before.
Can you make sense ... If you had to work out $23 \times 21$ how would you do it
?

Noticing the regular movement of the Sun and the stars has led to a desire to
measure time . This article for teachers and learners looks at the history of man's ...

Sufficient but Not Necessary : Two Eyes and Seki in Go : nrich.maths The game of go has a simple mechanism. This discussion of the principle of two
eyes in go has shown that the game does not depend on equally clear-cut ...

Galloping gyroscopes | plus.maths.orgIn the Department of Engineering at Cambridge University we have a few hand-
held battery - powered gyros , as shown in figure 4, and they do really strange ...

Career interview: Audio software engineer | plus.maths.orgSkot McDonald is an audio software engineer, currently building software
synthesisers for Fxpansion, a London-based company specialising in ...

Sweets in a Box : nrich.maths.orgHow many different shaped boxes can you design for 36 sweets in one layer?
Can you arrange the sweets so that no sweets of the same colour are next to
each ...

History of Morse : nrich.maths.orgThis short article gives an outline of the origins of Morse code and its inventor ... A
telegraph receiver on the other end of the wire converted the impulses back ...

Developing Good Team - working Skills : nrich.maths.orgThis article describes attributes of effective team work and links to 'Team Building'
problems that can be used to develop learners' team working skills.

String Theory, Duality and Art - Millennium Mathematics ProjectString Theory, Duality and Art : how the Higgs boson and Turner Prize ... been
recurrent themes in the work of both artist Grenville Davey and ...

Kissing the frog : A mathematician's guide to mating | plus.maths.orgIf there are $ N $ frogs in the pond, you will kick back the first $M$ frogs, and then
kiss the next frog that has a higher number than all those you have seen so far.

Ebooks ! Ebooks ! Read all about it! | plus .maths.orgWe are very excited to launch our very first ebooks ! These are collections of Plus
articles on particular themes that have intrigued, challenged and entertained ...

Enriching Data Handling : nrich. maths .orgData handling is one of the central activities in which real mathematicians
engage: they are frequently analysing data that they have gathered in various
contexts ...

Blink and you'll miss it: The free kick in football (part I) | plus.maths.orgOn 12 June the World Cup kicks off in Brazil where 32 teams will compete for the
greatest prize in football. A total of 64 games will be played up ...

Adding with the Abacus : nrich.maths.orgThe most common base is 10, but we still use base 60 when we tell the time: ...
With calculators and computers, the use of the abacus has declined even more.

Learning Mathematics Through Games Series: 1. Why ... - NrichThis article supplies teachers with information that may be useful in better
understanding the nature of games and their role in teaching and learning ...

John Conway – discovering free will (part I) | plus.maths.orgSimon Kochen and John Conway explaining their Free Will Theorem (photo:
Princeton University, Office of Communications, Denise ...

Game Theory | Maths and SportIf your team scores first in a football match, how likely is it to win? And are maths
and sportsmanship at odds on whether players should ever commit a ...

Finding order in chaos | plus.maths.orgSo, does nature have any pattern and order beneath it? Despite the evidence of
children (I have two!) the answer is essentially: "Yes". We will ...

Tournament Scheduling : nrich.maths.orgIn a Round Robin tournament every team plays every other team . There is a
systematic approach to scheduling a Round Robin tournament . This method ...

Numbers and the Number System :: Place value : nrich.maths.orgFour of these clues are needed to find the chosen number on this grid and four ....
This is a game in which your counters move in a spiral round the snail's shell.

The Olympic Torch Tour : nrich.maths.orgThe plan is to cover towns and villages so that 95% of Britons will be within 10
miles of the torch relay. Imagine a mini - Olympic torch tour running between 4 ...

A-level Core Mathematics Curriculum : nrich. maths .orgA-level mathematics is currently modular giving students a choice in the maths
they study for their AS (1 year course) or A level (extending the AS). Modules are
...

Mathematics Tools :: Pinboard/geoboard : nrich.maths.orgNine- pin Triangles. Stage: 2 ... Can you make a right-angled triangle on this peg-
board by joining up three points round the edge? ... Polygons drawn on square
dotty paper have dots on their perimeter (p) and often internal (i) ones as well.

Mathematical mysteries: Strange Geometries | plus.maths.orgThe famous artist Escher was fascinated by geometry. In the picture below, he
illustrates a flat geometry with interlocking angels and devils .

Why are we here ? | plus.maths.orgDavid Sloan has a great response for someone asking him what he does for a
living: "I calculate how likely it is that the Universe exists.

Building with Solid Shapes : nrich.maths.orgWe have a box of solid shapes . In it there are cubes, triangular prisms, cones,
cuboids, cylinders and tetrahedrons. 6 shapes. Which of the buildings below ...

Doppler detectives | plus.maths.orgmetres per second ), $\lambda $ is the wavelength and $f$ is the frequency. The
wave radiates out from the ambulance in all directions, the ...