Question 19
Andreas, Vasilis, Yiannis and Demetris have books in their bags. One of them has one book in his bag, another one has two, another has three and the last one has four. Andreas, Vasilis and Demetris together have 6 books in their bags. Vasilis and Yiannis together have 6 books in their bags. Vasilis has fewer books in his bag than Andreas. Who has only one book in his bag?