#7 – Chess Players
In a class of 30, at least one person out of two knows how to play chess. If there is at least one individual in this group who does not know how to play, what is the number of those who do know?
The Prize for This Question: Rubik’s 3×3 Cube
The Winner of Puzzle #5: Batuhan Sütbaş
This question was prepared by Emrehan Halıcı, president of the Turkey Intelligence Foundation, for Bilkent IEEE.