I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Can you find out which options fits best with the missing column?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

How can you write nineteen in a manner that if we take out one, it becomes twenty?