It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

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

What does this say?

XLR8

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

What do you answer even though it never asks you questions?

An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet.

How much time do you think the monkey will take to reach the top of the pole?

I always drive my customer away.

Who am I?