81 x 9 = 801. What must you do to make the this equation true?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Take one out and scratch my head, I am now black but once was red. What am I?

How can a man go eight days without sleep?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

I look at you, you look at me I raise my right, you raise your left. What am I?

An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

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 ?