Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

The answer I give is yes, but what I mean is no. What was the question?

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

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

what one word does the below rebus identifies?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

Rob is taller than Edwin, and Jurgen is shorter than Rob.
Of only one of the following statements, we now certainly know it is correct:

A.Edwin is taller than Jurgen
B.Jurgen is taller than Edwin
C.It cannot be determined if Jurgen or Edwin is the tallest.