No one wants to have it, but if one got it, he does not want to lose it. What is It?

I am not a bull but I have horns.
I am not an ass but I have a pack saddle.
Wherever I go, I leave silver behind me.

Who am I?

Can you count the number of lines in the below picture?

Replace the question mark with the correct number in below Picture:

I cannot talk, but I always reply when spoken to. What am I?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

If 21x = 79x, what is the value of x?

You can see it everyday, But cannot touch it at will. What is it?