Can you replace the question mark with the correct number in the below table sequence?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

When does a USA Potato change its nationality?

what's the probability of getting a king or a queen from a pack of 52 cards?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

If a wheel has 54 spokes, how many spaces are there between the spokes?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What is the centre of gravity?

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?