Can you replace the question mark with the correct number?

What is wrong in the below Picture?

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

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

Why is the Hole below a Lock?

Why do people go to bed?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

A Man gave one of his sons 10 cents and another son was given 15 cents. What time is it?
Hint: Figure out the relation between time and number, is not so easy..:)

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes