what does the below rebus means?

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

Who am I?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

Can you solve below mathematical equation?

2^1234 - 2^1233

What does this rebus means ?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?