# Riddle #52

## If you eat it you die

Poor people have it. Rich people need it. If you eat it you die. What is it?
Nothing.
61.99 %

## I will follow no matter how fast you run

Each morning I appear to lie at your feet. All day I will follow no matter how fast you run, yet I nearly perish in the midday sun.
69.65 %

## Inside a house

What man cannot live inside a house?
Snowman.
69.20 %

## Ghosts

What room do ghosts avoid?
The living room.
69.20 %

## I'm white and empty

I don't have eyes, but once I did see. Once I had thoughts, but now I'm white and empty.
Skull.
68.88 %

## Can run but can't walk

What can run but can't walk?
A drop of water.
67.94 %

## Iced Tea

Two girls ate dinner together. They both ordered iced tea. One girl drank them very fast and had finished five in the time it took the other to drink just one. The girl who drank one died while the other survived. All of the drinks were poisoned. How is that possible?
The poison was in the ice.
66.27 %

## Alive without breath

I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?
Fish.
60.50 %

## Always come down and never ever go up

I always come down and never ever go up? Think, think and think! We all just love it.
Rain.
55.32 %

## Ants on a Board

There are 100 ants on a board that is 1 meter long, each facing either left or right and walking at a pace of 1 meter per minute. The board is so narrow that the ants cannot pass each other; when two ants walk into each other, they each instantly turn around and continue walking in the opposite direction. When an ant reaches the end of the board, it falls off the edge. From the moment the ants start walking, what is the longest amount of time that could pass before all the ants have fallen off the plank? You can assume that each ant has infinitely small length.
The longest amount of time that could pass would be 1 minute. If you were looking at the board from the side and could only see the silhouettes of the board and the ants, then when two ants walked into each other and turned around, it would look to you as if the ants had walked right by each other. In fact, the effect of two ants walking into each other and then turning around is essentially the same as two ants walking past one another: we just have two ants at that point walking in opposite directions. So we can treat the board as if the ants are walking past each other. In this case, the longest any ant can be on the board is 1 minute (since the board is 1 meter long and the ants walk at 1 meter per minute). Thus, after 1 minute, all the ants will be off the board.
74.27 %