How can one talk without saying a single word?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

I am a word that begins with the letter “i.” If you add the letter “a” to me, I become a new word with a different meaning, but that sounds exactly the same. What word am I?

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

A man dies of old age on his 25 birthday. How is this possible?