有珍珠95顆,其中有一顆是假的,假的重量舆真的不一樣,其他一切皆相同,問用天秤,能在多少次中將假的找出來? 假若我們不詳細地加以研究,很可能需要七次或八次才能找到假的,事實上,正確的答案是五次使用天秤就够了。 現在把這問題推廣起來,並分成三種情形來討論。 (一) 假若知道假珍珠舆真珍珠誰輕誰重的話,n次使用天秤,能在多少珍珠中分出假的來。我們若知道假的輕重,則可以一次分爲三堆 There are 95 pearls, one of which is false. The false weight is really different. Everything else is the same. How many times can you use the scales to find false? If we do not study in detail, It may take seven or eight times to find false. In fact, the correct answer is to use Libra for five times. This problem is now generalized and divided into three scenarios. (a) If you know who is the weight of false pearls and pearls, use scales n times, and you can tell the number of fake pearls. If we know the degree of falsehood, we can divide it into three heaps at a time.