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?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Look at me. I can bring a smile to your face, A tear to your eye, Or even a thought to your mind. But, I can't be seen. What am I?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

I have feet, but no legs. Which animal Am I?

Why do we preferably have round manhole covers and not square ones?

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 next number in the series

12, 20, 40, 72, 116, 172 ?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.