How can one talk without saying a single word?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What does this say?

XLR8

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

What is common among 11, 69, and 88?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

You have to fill the below given grid in a manner that every row and column contains the digits 1 to 6. Also, make sure that the squares that are connected with each other must contains the same digit.

How can you make a TV, a bed, a dog, and a car liquid?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

Before Mount Everest was discovered, what was the highest mountain in the world?