Jolly Roger Sign (Free)

This puzzle game for Android is more than just a game, it will definitely make you smarter. You will feel it once you get the secret of this game that improves your logical and non-standard thinking.
By the way, the task that you need to solve here might be given as a test to a person who applies for a job that requires finding optimal solutions in the tasks which can be solved in different ways.

Here is the story.
Imagine that you are caught by pirates who want to feed you to the sharks for fun if you loose the game. They threw you on a wooden deck of their ship and gave you a number of black signs. The two sides of each sign are a Roger sign and a blank side. And then they bandaged your your eyes.
- Divide the signs into two piles so that there is the same number of Roger signs in each pile. If you succeed we will let you go. You may flip over the signs as many times as you want, - Laughed the pirates.

Before you start finding your life-saving solution please be aware that there is a strategy that always allows you to solve this task regardless of the initial number of Roger and Blank signs. Think it over using your logic skills and non-standard thinking (standard way of thinking will definitely turn you into the sharks' lunch.)

The app is available in both free and pro versions. The latter advantages with additional learning options and a strategy solution for the puzzle.