What runs around the whole yard without moving?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

why number 8549176320 is one of a kind?

Can you find the missing piece of the Porsche?

I know a nine-letter word having only one vowel.
Do you ?

The more it dries, the wetter it becomes. Can you tell what it is?

John was drowned by he was not wet. How?

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

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?