Why do some big successful brands go bust?

Toast is back for a new series, taking a look at the decisions that often left investors burnt.

I'm Sean Farrington, a BBC business journalist. I'll be hearing about the hype.

They're going to do the deal that makes them the most money at that point of time.

And I'm picking what went wrong, talking to owners

and employees to ask, what can we learn? It was being undercut by similar rivals. It just couldn't

survive. Toast. Listen first on BBC Sounds. Hello and thanks for downloading the more or less

podcast with me, Tim Harford,

with a program that looks at the numbers in the news, in life, and today in puzzles.

Why would you buy a book of puzzles when you're told in advance that you are going to get them wrong?

That's what's on offer in Alex Bellos' new book, Think Twice. Alex is, of course, a long-time friend of the program and a real

enthusiast for having fun with maths. I sat down with him to talk about the strange pleasure of puzzles

that fool us, and to be set a few puzzles

along the way. Obviously, I'm a journalist, so I'd like to say headlines, some, you know,

everyone will get this wrong, but some of them I do have the data, and the one that I have the most

data, is a puzzle I've called Wandering Eyes where I set this in my guardian puzzle column.

200,000 readers replied.

I told them they were going to get it wrong and 73% still did.

Okay, so give us the puzzle.

So Jack is looking at Anne.

Anne is looking at George. Jack is married, but George is not? And the

question is, is a married person looking at an unmarried person? There are three possible answers.

...