Can you count the number of triangles in the given figure?

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?

Find the next number in the series

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

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Find out the missing number in the picture attached:

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

John is found dead in a bare field. Nobody killed John,
John did not commit suicide.

Inspector Jacob found a bag just a few meters away from John which could save his life. What was in the bag?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?