A man dies of old age on his 25 birthday. How is this possible?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

There's a day, that comes around once a year.
To celebrate the man, you hold dear.
He gave you life, love and will pick you up if you fall.
When it comes to guys like him, He's the best of all.
Who is he?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What is the last thing you take off before bed?

Which five letter word can be added at the end of below word to form a
valid word?

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The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?