There is something which you can be arrested for attempting but not for successfully completing.

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Make a sentence consisting of three words that have the whole alphabet.

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.