Less than 2 percent of people find out who the killer is in this picture.

Murder samples are a lot of fun, but only in the world of literature and cinema. Have you ever solved a mystery quiz?

These kinds of mysteries are not only fun to solve, but they also give your brain much needed exercise. Unfortunately, while we take good care of the body, we don't do the same for the brain.

And if you need to do some mental training, here's a riddle that'll give him the push he needs.

Look closely at the picture. On the left is a woman's dead body. Yeah, she was brutally murdered, but the question is who did it. There are four suspects; can you guess who the killer is?

Try to find it, and then look at the answers below.

The killer is No. 4. Because;

1. The knife (the victim's murder tool) is missing at his dining table!
2. Her clothes are unspoiled (see her shirt sleeve), which indicates that she may have been in a fight with someone.
3. Finally, a blood stain is seen in his ear. /The world.al