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

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

Find the missing number in the image below.

You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

what's the probability of getting a king or a queen from a pack of 52 cards?

Be active and find the killer in the picture Riddle below.

Here is a mathematical expression that also secretly tells a movie name. What movie is that?