Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

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?

What is the longest word in the dictionary?

What has lots of eyes, but can’t see?

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Can you solve below mathematical equation?

2^1234 - 2^1233