A car is travelling at a uniform speed.
The driver sees a milestone showing a 2-digit number. After travelling for an hour the driver sees another milestone with the same digits in reverse order. After another hour the driver sees another milestone containing the same two digits as in the first one but the two digits separated by a zero(0).

What is the speed of the car?

(In reply to please ignore by FatBoy)

FB: It's pretty much the same as I came up with, except I used lower case a & b ;-)

SK: I wasn't implying you did use brute force, I was just differentiating my answer from whatever program Charlie posts. I hope that one day when I'm all grown up I can be as clever as you and work things like this out in my head.

Posted by fwaff on 2003-10-03 10:55:39