What is so fragile that saying its name breaks it?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

The answer I give is yes, but what I mean is no. What was the question?

I have Rs.50 and I spend it in the way as below.

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Can it be possible to build a house that has all its four walls facing towards the South?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?