Can it be possible to build a house that has all its four walls facing towards the South?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

The centre of the third figure is empty. What digit should fit inside?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

James ordered a fishing rod, priced at $3.56. Unfortunately, James is an Eskimo who lives in a very remote part of Greenland and the import rules forbid any package longer than 4 feet to be imported. The fishing rod was 4 feet and 1 inch, just a little too long, so how can the fishing rod be mailed to James without breaking the rules? Ideally James would like the fishing rod to arrive in one piece!

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

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