Can you find the thief by just looking at the picture below?

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

Who am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I have an eye but still cannot see.

Who am I?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat