近年来,在各级各类数学竞赛或数学考试中屡屡出现一类所谓的“数字黑洞”问题.这类问题既有趣、又神秘,还很怪异,往往让人琢磨不透.而教辅杂志或互联网上的相关文章大多数总是惊叹这些“数字黑洞”是如何的奇妙,如何的乖巧,却对它们的内在奥秘闭口不提.笔者经过仔细研究,对一些 In recent years, there has been a series of so-called “digital black hole” problems in various types of mathematics competitions or in mathematics examinations. These kinds of questions are both interesting and mysterious. They are also very weird. They are often unpredictable. Or most of the articles on the Internet are always amazed at how wonderful these “digital black holes” are, how well-behaved them are, but they don’t mention their inner mysteries. After careful study, the author has studied some of them.