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

What does this rebus means ?

PROG WORKRESS

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

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)?

Can you solve below mathematical equation?

2^1234 - 2^1233

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Name a key which is hardest to turn.

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