why number 8549176320 is one of a kind?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Can you replace the question mark with the correct number?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?