Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

A large water tank has two inlet pipes (a large one and a small one) and one outlet pipe. It takes 3 hours to fill the tank with the large inlet pipe. On the other hand, it takes 6 hours to fill the tank with the small inlet pipe. The outlet pipe allows the full tank to be emptied in 9 hours.

What fraction of the tank (initially empty) will be filled in 0.64 hours if all three pipes are in operation? Give your answer to two decimal places (e.g., 0.25, 0.5, or 0.75).

You walk into an old horror house. It has no power or plumbing. Once inside, you see three doors. Each door has a number on it. Behind each door is a way for you to die. Behind door number one, you die by getting eaten by a lion. Behind door number two, you die by getting murdered. Behind door number three, you die by an electric chair. You can’t turn back, so you have to go through a door. Which door do you go through?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?