What does this rebus riddle means ?

In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.

97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.

73 students studied all the three branches.

Can you find out the total number of students?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

You stand in front of two doors. A guard stands next to each door. You know the following things: one path leads to paradise, the other leads to death. You cannot distinguish between the two doors. You also know that one of the two guards always tells the truth and the other always lies. You have permission to ask one guard one question to discover which door leads to paradise. What one question would you ask to guarantee you enter the door to paradise?

A man escapes from jail using help from his girlfriend. The investigators suspect four girls of being the man's girlfriend.

Out of those four girls, one is his girlfriend who is lying. Two of the girls are completely innocent and are speaking the truth. One of the girls is the man's sister who is helping the girlfriend lie. Following are the statements from all four of them:

Ariana: "Myrna is his girlfriend."
Jane: "Angelina is lying."
Angelina: "Ariana is lying."
Myrna: "Jane is not his sister."

Can you find out who is the man's sister among them?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

The answer I give is yes, but what I mean is no. What was the question?

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?

If your uncle’s sister is not your aunt, what relation is she to you?

Find the next number in the series below

21 32 54 87 131 ?