Explain: Elevator Puzzle
The Puzzle:
 | A man works on the 10th floor and always takes the elevator down to ground level at the end of the day. |
But he will go all the way to the 10th floor when others are in the elevator with him or on a rainy day.
Why?
He is too short to reach the "10" button.
But when others are with him, he can ask them to push the button for the 10th floor.
And on a rainy day he has an umbrella, so he can push the button using that.