In an auditorium, 360 chairs are to be set up in a rectangular arrangement with x rows c exactly y chairs each. If the only other restriction is that 10 < x < 25, how many different rectangular arrangements are possible?
Four
Five
Six
Eight
Nine
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(x,y)可以是(12,30)但不能是(30,12)!
(x,y)可以是(12,30)但不能是(30,12)!
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