尊敬的《发现》编辑: 对贵刊2003年第2期摘登的趣味知识《不变的1089》,笔者很感兴趣,果然屡试不爽。后来,经笔者进一步研究,有了更有趣的发现,希望能够与广大读者分享。一、不变的10890和9999 取任何一个斗位数,最后一位数字必须为0,然后把这个数字的前3位倒转过来,用这个4位数减去 Dear “Discovery” Editor: The second edition of your 2003 issue of the fun knowledge of the “1089”, I am very interested, really tried out. Later, after further study by the author, with more interesting discoveries, I hope to share with readers. First, the same 10890 and 9999 to take any one bucket number, the last digit must be 0, and then the first three digits of this figure upside down, with this 4-digit minus