What number comes next in the series?

5 15 5 18 5 24 14 20 _

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

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

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

What kind of band never plays music?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

what does this picture(rebus) riddle means ?

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).

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?