A man dies of old age on his 25 birthday. How is this possible?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

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?

In the image below, can you find the value of an angle(y)

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?