What is the next number in this matchsticks series riddle?

Can you count the number of triangles in the given picture?

I always drive my customer away.

Who am I?

What does a man do only once in his lifetime, but women do once a year after they are 29?

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?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

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

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).

Can you decipher the below rebus?

PBLUESAISNUERSES

What makes this number unique: 8,549,176,320?