What is full of holes but still holds water?

Find the missing number in the image below.

John has played 50 ODI's and his average is 50. How many runs should he score in his 51st ODI, so that his average score jumps to 51?

On one occasion, A Boy collects 71 rupees in form of 20 paise and 25 paise. He collects a total of 324 coins.

Can you tell me how many 20-paisa and 25-paisa he got?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Can you count the number of squares in the figure below?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

10+10 and 11+11 can give you the same answer.

Explain how?

Move four matchsticks to the below square to form three squares?