What does does this rebus picture means ?

What does below Rebus mean ?

esgg sgeg gegs gsge

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Identify the 10 differences between the two given pictures.

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

What am I?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?