In the four images below, can you find the odd one out?

John was writing his first book. After saving the document, he locked his laptop with a password and mentioned some phrases for the hint box.

A friend of his tried opening his laptop but found out that it was password protected. Following is the hint that appeared.
1 mobile 3 books 2 roars 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches.

Can you help him in cracking the password?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

No matter how little or how much you use me, you change me every month. What am I?

In a box, there is a jumble of 7 red balls, 6 blue balls, 5 green balls, and 4 yellow balls. What is the minimum number of balls, will you have to pick up so that you have at least 4 balls of the same colour?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What is more useful when it is broken?

Can you find the company name in the pictogram below?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?