What is the below Rebus indicate?

Can you find the key in the picture below?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Can you identify the Oscar-winning movie from the rebus below?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

What breaks yet never falls, and what falls yet never breaks?

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?