There is something which is always coming but never arrives?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

What work can one never finish?

What kind of tree can you carry in your hand?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

Find The Missing Number In the Sequence.
6 25 64 ? 32 1

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?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?