**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...

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 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.

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

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.