What is the word or phrase?

Can you write down eight eights so that they add up to one thousand?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

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

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

This was asked in an interview with Coa-Cola.

The interviewer has given me 100 marbles(50 white and 50 black) and two empty boxes.
He then told me that he will leave the room and i need to place all the marbles in two boxes.

And When he come back, he will draw a marble from any of the two box and if the marble is white I will be hired.

Also
* No box can be empty.
* All 100 marbles must be placed in one of the two boxes.

So what should I have done?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

What you cannot hold but it is yours?