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?

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

What can you catch but never throw?

What has 88 keys?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Can you name some countries which do not have the alphabet 'A' in them?

By using 'because' continuously three times, can you make an English statement ?

I have eight fingers and two thumbs but I do not live. What Am I?

Can anyone tell me a word in the English dictionary which has a silent 'z'?