What is always in front of you but can’t be seen?

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

What does a man do only once in his lifetime, but women do once a year after they are 29?

In the picture given below, can you find out which digit will take place of the question mark?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

Why is the Hole below a Lock?

What Adam and Eve do not have but the rest of the people have?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Why Aeroplane windows are round?