What goes up but never comes down?

Jim and Sarah are in a long-distance relationship. Jim buys an engagement ring for Sarah and wants to mail it to her. Unfortunately, the only way to ensure the ring will be received is to place a lock on the package. Jim has locks and Sarah has locks, but neither has keys for each other’s locks. How can they make sure the ring isn’t stolen?

What can go up a chimney down, but can’t go down a chimney up?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

What is the end of everything?

What does this simple rebus mean?

How many triangles can you find in this given picture?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

Why did Buffon take the goal with him after every Juventus match?

Can you count the number of lines in the below picture?