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

Move three sticks of the spiral below to form a square.

What has 88 keys?

Why do you find that most of the buildings are deprived of the 13th floor?

What word is represented by this rebus?

100 prisoners are stuck in the prison in solitary cells. The warden of the prison got bored one day and offered them a challenge. He will put one prisoner per day, selected at random (a prisoner can be selected more than once), into a special room with a light bulb and a switch which controls the bulb. No other prisoners can see or control the light bulb. The prisoner in the special room can either turn on the bulb, turn off the bulb or do nothing. On any day, the prisoners can stop this process and say "Every prisoner has been in the special room at least once". If that happens to be true, all the prisoners will be set free. If it is false, then all the prisoners will be executed. The prisoners are given some time to discuss and figure out a solution. How do they ensure they all go free?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Which fur should we be getting from the Lion?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?