September 20, 2006 6:04am CST
Jon and Maria are going away for a while. Before they go, they want know the weight of their bags. First Jon puts his bag on the scale, which shows 2 kg. Maria puts her on and the scale show 3 kg. When both bags are put simultaneously on the scale it shows 6 kg. Why does it show 6 kg and how much is the real weights of each bag?