Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

What am I?

What type of tree can I carry in my hand?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

What has a ring but no finger?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Can you identify the famous TV character from the rebus below?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?