What is the next number in this matchsticks series riddle?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

What has no start, end, or centre?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Our product and our sum always give the same answer. Who are we?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

You need to remove two matchsticks to make the below equation true. Can you do it ?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Take away the whole and some still remain. What is it?

What has a bottom at the top?