Identify The phrase in the picture.

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?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

What goes up but never comes down?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

Solve the puzzle by telling what does below picture means.