Zeus is the greek god of the skies. His lightening staff( Master bolt has been stolen. He suspects and infact he is quite sure that it has been stolen by someone from camp Halfblood ( a camp for demigods). So he called all the camp Halfblood members.
Zeus then commanded them to throw their bagpacks infront of him so that he can check them. He knows that the masterbolt is quite heavy, so it will make the backpack in which it is contained quite heavier from the other. However there are 270 members in the camp ( therefore 270 bags to check) . He summoned a huge balance scale to weigh the all the bags and find the bag containing the Master bolt.
However, Athena , the goddess of wisdom approached him and suggested him a way to use the scale as least as possible and find the bag. She told him the minimum number of times he needs to use the scale and how.
How many times did she suggest him?