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?
I didn't read ALL the posts so I'm not sure if someone mentioned this, but as usual with Ravioli Raja puzzles, they are open to interpretation.
When getting to the equation y=6x, there are two solutions, 0,0 and 1,6. So an alternative dumb solution is the man's car is not moving, and there are inexplicably 3 signs that have 2 zeroes, 2 zeroes and 3 zeroes respectively. However since this driver is so dumb, there are probably only two signs and he read the first one again the second time. Or there aren't 3 signs, but one sign that reads "Baboon food is so good" and someone has blacked over all the letters but the 'o's.