I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

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 ?

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

4 fathers, 2 grand-fathers and 4 sons went to watch the movie.What is the minimum number of tickets they need to buy ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?