A free app for Android, by DH3 Games.

Genius Test is a general knowledge IQ test, designed to make you think fast and make you enjoy the challenge, while testing your brain and mental agility.

The idea is to make you think you can beat a room of quiz questions, and at the same time to let you experience the difficulty of the questions, to make you feel the tension of the brain and the adrenaline rush in your veins.

The questions are in different levels, each of which has a different level of difficulty. You can unlock the next level by answering 20 questions in a row.

Each level contains thousands of questions from a number of different categories such as geography, biology, history, literature, art, science, and many more.

So if you want to enjoy the challenge and the general knowledge, you need to unlock all the levels and beat the quiz.