There are many ways to keep one’s mental agility and intellectual abilities sharp, using what has become popular entertainment on the web in recent times.

We’re talking about visual tests, which are games of both logical-intuitive and psychological nature, allowing players to spend their leisure time in a fun and enjoyable way.

The various tests differ in type and difficulty level, thus being able to satisfy the tastes and abilities of all its users.

At first glance, many of these quizzes might seem easy to execute, but in reality, it’s not the case.

One needs to demonstrate a keen ability to concentrate and observe.