It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

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

How many times in a given day, minutes and hour clock comes in a straight line ?

If 21x = 79x, what is the value of x?

You have four chains. Each chain has three links in it. Although it is difficult to cut the links, you wish to make a single loop with all 12 links. What is the fewest number of cuts you must make to accomplish this task?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

What two things can you never eat for breakfast?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?