World brain

It's very simple, you need to install the game "World Brain".
Which to sign in with Google.
This will allow you to play while maintaining your achievements.
You will be given a choice of several categories.
Example:
-Countries;
-Sport;
-Animals;
-Science;
-Ukraine;
-And other.
When choosing a category, you are asked the first 10 questions. To which you give answers.
The next 10 questions will be opened only after passing the first questions.
If you can't answer the question, you can use the hint. To use it, you'll need to review a short advertisement.
For each correct answer you get one point. The more correct answers, the more points.
Enjoy the game.