Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Find the value of "?" in the ball picture Riddle below:

A mother bought three dress for her triplets daughters(one for each) and put the dresses in the dark. One by one the girls come and pick a dress.
What is the probability that no girl will choose her own dress?

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 decided to give his bike 3 coats of paint. Which coat would go on the first?

Can you name an animal whose killing cannot be performed without spilling your own blood?

One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

Which is faster, Heat or Cold ? Explain.

Different lights make me strange by changing me into different sizes. What am I?

Keyboard words are not in alphabetical order, Why?