How many triangles are there on the puzzle below?

Who has married many women but was never married?

How can you tell a raw egg from a hard-boiled egg?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

One evening there was a murder in the home of a married couple, their son and daughter. One of these four people murdered one of the others. One of the members of the family witnessed the crime.

The other one helped the murderer.

These are the things we know for sure:

1. The witness and the one who helped the murderer were not of the same sex.

2. The oldest person and the witness were not of the same sex.

3. The youngest person and the victim were not of the same sex.

4. The one who helped the murderer was older than the victim.

5. The father was the oldest member of the family.

6. The murderer was not the youngest member of the family.

Who was the murderer?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

A dead body is found outside a multi-story multinational company. The case is reported and a homicide detective is called on the crime scene.

He looks at the body and then towards the building. From the position of the body, it is evident that the victim committed suicide. He goes to the first floor of the building and then walks in the direction of the dead body, opens the window and toss a coin in the air.

He goes to second floor and again repeats the process. He keeps doing this till he is done on all the floors. Then he returns back to the floor and tells his team that it is a murder.

How in heaven did he deduce that?

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

Can you find out the total number of triangles in the given figure?