What's the only room from which no one can enter or leave

Can you write down eight eights so that they add up to one thousand?

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

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

What part of the chicken has the most feathers?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

If,
9 * 8 * 7 = 65
8 * 7 * 6 = 50
7 * 6 * 5 = 37

Find
6 * 5 * 4 = ?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?