A Tribute To Richard Feynman: Feynman Point Pilish Poems 2013

Richard Feynman was born on 11 May 1918. Today would have been his 95th birthday. This isn’t...

The Math-e-Monday Puzzle: Squares from a Tetrahedral Die

It isn’t Monday, but I’m puzzled every day of the week.Alice is puzzled too; she’s playing...

The Math-e-Monday Puzzle: Infinite Packings Within Finite Figures

After the scramble to get out of jail, here are some questions about imprisoned shapes! In my last...

Solution to The Jailer's Revenge

The solution to the Jailer’s Revenge question is fairly lengthy, so I think it warrants a separate...

 Richard Mankiewicz I used to be lots of things, but all people see now is a red man. The universe has gifted me a rare autoimmune skin condition known as erythroderma, or exfoliative dermatitis. The idiopathic version... Read More » Blogroll

# Circles Stuck in a Triangle

Mar 02 2013 | comment(s)

I would like to start a new column of mathematical puzzles. Scientific American has one; New Scientist has one; so I hope Science 2.0 will be happy to host one!

Preamble over, here's your "started for 10".

The diagram shows five circles, each with integer radius, all touching the base of the large triangle. The four smaller circles all touch their two neighbouring circles, with the large circle touching all four. The two sides of the triangle each touch two of the circles.

Let the radii of the circles be a, b and c, such that a > b > c.

# How Would You Solve the Seven Bridges of Konigsberg Problem?

Feb 14 2013 | comment(s)

Famous problem, famous solution, but is that the whole story?

How would you solve the problem of crossing the seven bridges of Konigsberg?

Spiked Math proposes a number of other solutions that never made it into print.

Original cartoon can be found here - including the pop-up punchline.

Further creative solutions gratefully received.

# A Prime Valentine's Day

Feb 14 2013 | comment(s)

It is somewhat surreal to see the discovery of the largest prime number paraded on prime time broadcast media. Mathematicians around the world are asked to explain the significance of this discovery in layman’s terms, which is up there with physicists trying to explain what the Large Hadron Collider actually does.

Below you’ll see a pretty sparky Sky News interview by Eugenia Cheng, a senior lecturer at the University of Sheffield. Just notice at the very end how jolly pleased with themselves the newscasters seem to be.

# The Year for Mathematics of Planet Earth 2013: a call to bloggers

Dec 22 2012 | comment(s)

2013 will be the year of Mathematics of Planet Earth. This global initiative was spearheaded by Professor Christiane Rousseau of the University of Montreal, and it was fitting that the first national launch of MPE2013 was held in Canada on the 7th December 2012.

# Japan's Nuclear Tragedy - Is A Solution Close At Hand?

Mar 16 2011 | comment(s)

South Korea has agreed to send some 50 tons of boron from its reserves to Japan to help fight the nuclear disaster at the Fukushima reactor plant.

The scientists at TEPCO have been sent samples for analysis and a decision should be made pretty quickly. [Reuters, Korea Herald]

# UK Chief Scientific Adviser In Verbal Meltdown Over Fukushima Nuclear Disaster

Mar 16 2011 | comment(s)

The UK Government's Chief Scientific Adviser, Professor Sir John Beddington, is in Tokyo trying to dampen expat fears that the Fukushima nuclear reactors could possibly ruin their lives.

I had actually received snippets of this meeting by email and was tempted to publish them yesterday. Luckily, Sir John's wisdom is now online for all to see. I just wish to copy some excerpts.