Hello and welcome to more or less on the BBC World Service, where your guide to the numbers

all around us in the news and in life, and I'm Tim Harford.

At more or less, we're privileged to have a great number of listeners who send us

their confounding counting conundrums and ask us to have a crack at them.

My producer suggested Conundra, rather than Conundrums, but she's obviously winding

me up.

You can send us yours by emailing more or less at bbc.co.uk or tweeting at bbc more or less.

As it happens, many of these loyal listeners are from Australia, so we thought we'd have

a go at solving some of their Aussie numerical nightmares in this are down under spectacular.

First, do Australians have a problem with their pants?

Some of our listeners, Pete, alert us to a statistic from the podcast Occam's Razor.

Pete doesn't believe it.

One in seven Australian businessmen admit to never washing underclothes.

They just throw them away.

It's cheaper to re-buy it.

This is only the stuff that we're admitting to each other.

That's Dr Warren Riley from the University of Newcastle in New South Wales with an incredible

statistic about Australian businessmen's underwear habits.

But is it too incredible to be true, surely no one throws away their underpants after

just one day?

I mean, even if you don't want to do laundry, they're still back to front, inside out.

And then inside out and back to front, what are here to tell me more is reporter Sachin

...