With the help clues provided in the image, can you find the 5 digit key?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

What brings you down but never up?

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

Count the number of triangles in the below picture?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H