Can you replace the question mark with the correct number?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

Six people park their car in an underground parking of a store. The store has six floors in all. Each one of them goes to a different floor. Simon stays in the lift for the longest. Sia gets out before Peter but after Tracy. The first one to get out is Harold. Debra leaves after Tracy who gets out on the third floor.

Can you find out who leaves the lift on which floor?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Count the number of squares in the picture below.

What has many teeth, but cannot bite?

Suppose you are a girl candidate and sitting in an interview. Suddenly the interviewer asks you, 'What if one morning you wake up and find out that you are pregnant?

How will you reply to such a question?