Puzzle #126: Which weighing machine is faulty?
#126 More chocs-a-weigh Quality Control at the WonderSnack chocolate factory used to have a problem with one of the six machines that produce 200 gram chocolate bars (see puzzle #109 Chocs-a-weigh, 17 April , p 52). That faulty machine has been scrapped, but Hazel Nutt, the new quality control manager, has discovered that the same …