Why is 6 afraid of 7?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I travel all around the world but always stay in the corner. What am I?

Identify the hidden meaning behind this picture?

A number can be multiplied by multiple of nine
i.e 9 18 27 36 45 ...

and the resulting number consist of only one digit.

Can you identify the number ?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

You need to move three matchsticks to form three squares. Can you do it?

As a whole I am both
safe and secure.

Behead me and I become
a place of meeting.

Behead me again and I am
the partner of ready.

Restore me, and I become
the domain of beasts.

What am I?

How can one talk without saying a single word?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?