What is the next number in this series?

4,12,84,3612....

Where do you go to learn how to make ice cream?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

Find the missing number in the sequence below:

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?