What has a ring but no finger?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Different lights make me strange by changing me into different sizes. What am I?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

How many letters are in the alphabet?

What 5-letter word typed in all capital letters can be read the same upside down?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

During which month do people sleep the least?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?