81 x 9 = 801. What must you do to make the this equation true?

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

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

John is found dead in his office at his desk. The police have narrowed the suspects down to three people: Mrs. Jacob, John’s wife Hena and his business partner Jason . All three visited John on the day of his murder, but all three provide the police with stories of explanation as to the reason for their visit.
Police found John with his wrist watch still on his right arm, a torn up picture of his wife laying on the floor beside the trash can, and an ink pen in his right hand. On the desk, the police found a name plate, a telephone that was off the hook, and a personal calendar turned to the July 5th page with 7B91011 written on it. After examining this evidence, the police knew their suspect. Who was it ?

Find out the missing number in the picture attached:

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

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

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?