What is the next number in this series?

4,12,84,3612....

I know a nine-letter word having only one vowel.
Do you ?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

A cat had three kittens: Snophy, Topsy and Jorden. What was the mother's name?

Sally lives in a place where six months of the year is mild summer and the temperature drops significantly the other six months. She owns a lake where there is a small island. She wants to build a house on the island and needs to get materials there. She doesn’t have a boat, plane, or anything to transport them to the island. How does Sally solve this problem?

What is the Surname of Barbie Doll?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

Why do you find that most of the buildings are deprived of the 13th floor?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

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

How can this be possible?