An absentminded philosopher forgot to wind up the only clock in his house. He had no radio, television,
telephone, internet, or any other means of ascertaining the time. He therefore decided to travel by foot
to his friend's house, a few miles down a straight desert road. He stayed there for the night and when he
came back home the following morning, he was able to set his clock to the correct time. Assuming the
philosopher always walks at the same speed, how did he know the exact time upon his return? Note: this
is not a trick question. The Philosopher did not bring anything to his friend's house, nor did he bring
anything back with him on his trip home.
Do you have a suggestion
for this puzzle (e.g. something that should
be mentioned/clarified in the question or solution, bug, typo, etc.)?