What can you deduce from the following BrainBat?

CRY
LMKI

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

In the image below, can you find the value of an angle(y)

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?