I shave every day, but my beard stays the same. What am I?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

what does the below math rebus puzzle mean?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

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?

Can you find out the number that should replace the question mark with a valid reason?