What goes up but never comes down?
What is at the end of a rainbow?
Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?
It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?
What is so fragile that saying its name breaks it?
When I got four, I have it none. When I got two, I have it some. When I got none, I have it all. What is it?
I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?
What can you catch but never throw?
The more it dries, the wetter it becomes. Can you tell what it is?
There is something which is always coming but never arrives?
What is always in front of you but can’t be seen?
There is a cryptic organization called Cicada 3301 that posts challenging puzzles online, possibly to recruit codebreakers and linguists.
