What is the centre of gravity?

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

If your uncle’s sister is not your aunt, what relation is she to you?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What does Alexander the Great and Winnie the Pooh have in common?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

Find the last number in the series below:

voN luJ yaM raM ---

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.