What does below rebus means ?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

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

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

There are nine letters in the below-given diagram. You have to form a nine-letter word using these letters.

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

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1