What is the fastest way to double your money?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Find the last number in the series below:

voN luJ yaM raM ---

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

Usually, a boxing match consists of twelve rounds. In a particular friendly match between two heavyweights, the match was finished in the ninth round itself as one of the boxers knocked out the other one.

But, in that fight, no man threw even a single punch.

How can this be possible?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?