Complete the table series riddle by finding the number that can replace "??".

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

Can you make four (4) nines (9) equal 100?

What is the centre of gravity?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?