知识点:667×3=2001,6667×3=20001,而任何三位以内的数与2001相乘,积的后三位尾数必定是原数,任何四位以内的数与20001相乘,积的后四位尾数必定是原数.6在中国,倍受青睐,“六六大顺”源于中国古代的“宇宙由东西南北天地6个面组成,顺应宇宙,自然和谐”.然而,在西方人眼里,6却是一个不完美的数字.因为上帝花了7天时间创造世界,7代表着完美,那么与之 Knowledge points: 667 × 3 = 2001,6667 × 3 = 20001, and any three-digit number multiplied with 2001, the product of the last three mantissa must be the original number, any four-digit number multiplied by 20001, product The last four mantissa must be the original number.6 In China, much favored “Sixty-six Dashun ” originated from the ancient Chinese “universe composed of 6 surfaces from east, west, south and north, conform to the universe, natural harmony” However, in the eyes of Westerners, 6 is an imperfect figure because God spent 7 days creating the world, 7 representing perfection,