What has a ring but no finger?

Can you replace the question mark with the correct number in the below table sequence?

10+10 and 11+11 can give you the same answer.

Explain how?

Can you place three balls such that the equation shown in the picture holds true?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

What you cannot hold but it is yours?

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?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT