why number 8549176320 is one of a kind?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

Out of three Friends John, Jacob and Jonny one of them is a king, one is a bureaucrat, and one is a Spy.

The king always tells the truth, the bureaucrat always lies, and the Spy can either lie or tell the truth.

John says: Jonny is a bureaucrat
Jacob says: John is a king
Jonny says: I am a Spy

Tell me, Who is the king, who is the bureaucrat, and who is the Spy?

Replace the question mark with the correct number below.

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?