Coffee Milk consists of white, black and gray circles. The aim is to connect circles by horizontal and vertical lines. All connected circles form a group. Each group must contain exactly one gray circle and equal amounts of white and black circles. The lines must not cross other lines. White and black circles cannot be directly connected. brain teasers with answers - brain teaser puzzles - brain teaser games - brain teasers for adults - maths puzzles with answers - brain puzzle games - number puzzles - brain puzzles for adults - math puzzles for adults - brain games for adults - brain teasers riddles - mind puzzle games - mind puzzles for adults - mind puzzle