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
re: please ignore by fwaff)
I think the (perhaps unintentional) implication of the prior solution being brute force was there, due to your title... but no matter... :-)
I hope I never reach "all grown up" !
And it's always good to be able to work things out in one's head... IMHO... kinda like those 'math tricks' that they like to teach people to do....
e.g., what's 48 x 52...? Well... gee I don't know... but it's 2² less than 50² so... 2500 - 4 = 2496.... cool...
Edited on October 3, 2003, 11:27 am
re(2): please ignore
