喀氏数

  • 时间:2020-04-07 15:01:54
  • 分类:数学世界
  • 阅读:115 次

印度有个数学家叫喀普利卡。一天,他路过一个铁路道口,一块断成两截的里程指示牌引起了他的注意,上面原来写首的四个数字因为指示牌断开而被分成两个两位数:30和25。对数字特别有兴趣并且敏感的喀普利卡心里一亮:“这个数好奇怪呀!30+25=55,而55×55=3025。原数不是又再次重现了吗?”

后来,他经过研究、搜寻,又发现了一大批具备这样特点的数。人们于是把这样的怪数称为“喀普利卡数”,简称“喀氏数”,又称“分和累乘再现数”。

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