Question 61
A passenger wanted to know the speed of the bus in which he was traveling, so he looked through the window and saw on a road sign (denoting the distance from the town from where he started his traveling) two-digit number. After one hour drive he saw on another road sign a three-digit number written with the same two digits as one hour before but in opposite order and a zero between them. The passenger evaluated the speed of the bus and fell asleep. Two hours later he woke up and saw on a road sign three-digit number with first and last digit same as the number two hours ago but different middle digit. If we know that the bus had constant speed determine the speed and the numbers which the passenger saw on the road signs.