Answer to Donald Duck in Mathmagic Land
During Maths at: the Movies, Donald Duck in Mathmagic Land Ben presented the following conundrum. Ben's greengrocer uses a balance scale, like the one seen above, and only has a 40kg weight. However, the greengrocer fortuitously broke the weight into four pieces of integer weight that will allow them to measure out every integer of kilograms from 1kg to 40kg. What are the four weights? Normally, for a problem like this, you'd think of the binary sequence 1, 2, 4, ..., because, as shown in the
en-us