What country can make you shiver?

You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What type of tree can I carry in my hand?

I always drive my customer away.

Who am I?

It has a long neck, A name of a bird, Feeds on cargo of ships, It's not alive,

What is it?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

Can you replace the question mark with the correct number?

How many times do a clock's hands overlap in a day ?

What has lots of eyes, but can’t see?