What do you answer even though it never asks you questions?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How many times do a clock's hands overlap in a day ?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

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?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

When we see 2 but call 10?

I am beautiful, up in the sky. I am magical, yet I cannot fly. To people I bring luck, and to some people, riches. The boy at my end does whatever he wishes. What am I?

How can you leave a room with two legs and return with six legs?

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?