Can you place six X (crosses) in below board without making three in a row in any way ?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

Can you decipher the two rows to find the hidden word?

Which letter of the alphabet has the most water?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What kind of storm is always in a rush?

There are nine dots in the picture that has been attached with this question. Can you join all the dots by drawing four straight lines without picking up your pen?

What is full of holes but still holds water?