There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

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?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

By what process could you make a 'Tea-Table' into food?

How far can you walk into the woods?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

If it took eight men ten hours to build a wall, how long would it take four men to build it?