In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Buy me, smell me or deliver me, I do not change.

Who am I?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Why do we preferably have round manhole covers and not square ones?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

Can you find out the number that should replace the question mark with a valid reason?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

What does this rebus riddle means ?