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

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At 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." How can that be possible?

There is a hypothetical state between the USA and Mexico border 'Tango'.
Here 70 percent of the population have defective eyesight, 75 percent are hard of hearing, 80 percent have Nose trouble and 85 percent suffer from allergies, what percentage (at a minimum) suffer from all four ailments?

What is the centre of gravity?

John was drowned by he was not wet. How?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?