# Quite Easily Done

Created: | 2011-07-21 12:28 |
---|---|

Institution: | Department of Applied Maths and Theoretical Physics |

Description: | A weekly homemade series of puzzles, tricks and mathematics from James Grime of Cambridge University. |

# Media items

This collection contains 38 media items.

### Media items

#### 10000 YouTube Subscribers and Wisdom of the Crowds

QED Gold: Originally uploaded 12th June 2011

Competition is over I'm afraid, but you may still like to play.

Here's a photo of the jar: http://tumblr.com/xqt2yusc39

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Mon 31 Oct 2011

#### 28 Minutes Later - The Maths of Zombies

So, to survive a zombie attack you need to run. In the long term we need a fortified society, but if the barricades fall we need to reduce the speed of infection, slow them down,...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Wed 26 Oct 2011

#### Benford's Law - How mathematics can detect fraud!

Benford's Law is a truly surprising fact about the frequency of numbers when studying data such as prices, populations, rivers, even street addresses. And if someone's accounts do...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Tue 16 Aug 2011

#### Can you crack the combination lock?

The sequence 11221 contains all 2-digit combinations using the numbers 1 and 2.

Can you find a sequence that contains all the 3-digit combinations using the numbers 1, 2, and...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Fri 16 Dec 2011

#### Can you crack the combination lock? - Solution

The sequence 11221 contains all 2-digit combinations using the numbers 1 and 2. A sequence such as that is called a De Bruijn sequence. I show you three methods to find such...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Sun 18 Dec 2011

#### Connect The Towns

What is the minimum distance to connect four towns?

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Thu 21 Jul 2011

#### Flipping 10 heads in a row

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Sun 4 Sep 2011

#### Flipping 10 heads in a row: Full video

Even unlikely events happen given enough opportunities.

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Sun 4 Sep 2011

#### Game of Nine

Here is a game for you to play and investigate. Is there a winning strategy?

Each player takes it in turns to pick a number, the first to pick three numbers that add up to 15...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Thu 8 Sep 2011

#### Game of Nine Solution

Solution to my 'Game of Nine' video: http://youtu.be/ue4Baa8Mhn8

Each player takes it in turns to pick a number, the first to pick three numbers that add up to 15 wins.

With...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Fri 16 Sep 2011

#### Make a Post-it Note Dodecahedron!

How to make a Post-it Note Dodecahedron. Fun and beautiful! If you make one yourself send me the photo! Email address in the video.

Follow me on Facebook/twitter etc...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Fri 14 Oct 2011

#### Maths Problem: Connect the towns solution (Motorway Problem)

What is the minimum amount of road needed to connect these four towns together? Known as the Motorway Problem or Steiner Problem. An experimental solution.

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Tue 16 Aug 2011

#### Maths Puzzle: Back to Black

I have a board that uses the numbers 1 to 90. I fill the board with Othello piece, they are black on one side and white on the other. All the pieces start black side up. First I...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Thu 19 Jan 2012

#### Maths Puzzle: Coins

QED Gold: Originally uploaded 31st January 2011.

Take a random pile of coins. If I tell you how many coins are heads and how many coins are tails, can you separate the pile...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Mon 20 Feb 2012

#### Maths Puzzle: Coins Solution

QED Gold: Originally uploaded 4th February 2011

Take a random pile of coins. If I tell you how many coins are heads and how many coins are tails, can you separate the pile...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Sun 26 Feb 2012

#### Maths Puzzle: First to get a head

QED Gold: Originally uploaded 25th May 2011.

Let's get ready to rhumble...!

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Sun 20 Nov 2011

#### Maths Puzzle: First to get a head solution

QED Gold: Originally uploaded 28th May 2011

Solution the the First to get a head problem

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Tue 13 Dec 2011

#### Mentally Unsolvable (?) Card Trick Tutorial

QED Gold: Originally uploaded 17th July 2011.

Watch the tutorial by mismag822 http://www.youtube.com/watch?v=4BZFx1eUOFs

Originally posted by zachcloseupmagic...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Mon 24 Oct 2011

#### Möbius Strip Hearts (For Valentine's Day)

QED Gold: Originally uploaded 6th February 2011.

The Möbius Strip is a strange mathematical shape which is a loop with only one side and one edge. For more information see...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Mon 6 Feb 2012

#### Puzzle: Mathematical Ants

A little puzzle to pass the time...

**Collection**:
Quite Easily Done

**Institution**:
Department of Applied Maths and Theoretical Physics

**Created**:
Thu 22 Sep 2011