How can one talk without saying a single word?

what one word does the below rebus identifies?

what does this below rebus represent identXQQQQQME

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?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

A Doctor always sneezes before the rain. Doctor sneezes, Will it rain?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

By using 'because' continuously three times, can you make an English statement ?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?