Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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?

How is the moon similar to a dollar?

In the image given, you can find several triangles. Can you count them all?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?

The more you take me, the more you leave me behind.
Who Am I?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?