IMO due to the lack of brackets defining the actual sums both 20 and 320 are correct...Neither is wrong but neither is right as the perimeters of the sum have not been defined...
Quote from: Len on 11 February 2013, 13:07Quote from: X4MGS on 11 February 2013, 13:02320How?4x4(16)+4(20)x4(80)+4(84)-4(80)x4(320)
Quote from: X4MGS on 11 February 2013, 13:02320How?
320