Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

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

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Can you count the number of children in the picture below

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?