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

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

The horse jumps over the king.
Strangely there is absolutely no scratch on him.

Can anyone explain, how is this possible?

Using exactly three matchsticks, can you divide the area into two equal parts?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

John was piloting a plane behind a car but was never able to overtake it. Why?