Which tank will fill first?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

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?

what does this picture(rebus) riddle means ?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Find the number of squares in the below-given picture.

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

A man walked into a pub and went straight towards the Barman. He asked for a dirty martini from the Barman. The Barman thought something and then pulled out a pistol from his drawer and aimed it directly at the man. Why did he do that?

What does this Rebus Picture mean?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?