(Iceland 2009) A number of persons seat at a round table. It is known that there are 7 women who have a woman to their right and 12 women who have a man to their right. We know that 3 out of each 4...

(Iceland 2009) A number of persons seat at a round table. It is known

that there are 7 women who have a woman to their right and 12 women who have a

man to their right. We know that 3 out of each 4 men have a woman to their right.