If you say my name, I will no longer exist. What am I?

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).

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

Can you solve this picture maths equation?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

How many letters are in the alphabet?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Different lights make me strange by changing me into different sizes. What am I?

What can you catch but never throw?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.