###Human: A tiger shark has 180 teeth.  A hammerhead shark has 1/6 the number of teeth that a tiger shark has.  A great white shark has double the sum of teeth of a tiger shark and a hammerhead shark. How many teeth does a great white shark have?, ### Assistant: Hammerhead shark:180/6=30
Great White:2(180+30)=420 teeth 
 So the answer is :  420