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

I look at you, you look at me, I raise my right, you raise your left. What am I?

People put me on the table and cut me but do not eat me. What am I?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

What can you catch but never throw?

What is so fragile that saying its name breaks it?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

A patient was diagnosed with some ailment. He was given five different tablets to take at night at an interval of 15 minutes.

How long will it take the patient to consume all the five tablets?

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

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