Those who visited the port, selected small scurrying ships carrying huge liners and tankers. These are tugs - invisible harbor laborers. Despite their plain look, they perform an important function - towing ships and are endowed with remarkable strength. We suggest you in the game Tug Team Tugboat Addition to participate in the tug competitions. Choose a ship, paint it in any color and bring it to the start. Your opponent is a computer and he is already standing on the right side. The task is to pull the rope over. To do this, opponents will need strength, and you - the ability to quickly solve mathematical problems. Quickly find the right answers, the speed depends on the speed.