数学故事:流传久远的算术趣题
- 时间:2022-06-01 16:22:42
- 分类:数学世界
- 阅读:155 次
古代俄罗斯民间流传着这样的算术题:
“路上走着七个老头,
每个老头拿着七根手杖,
每根手杖上有七个树杈,
每个树杈上挂着七个竹篮,
每个竹篮里有七个竹笼,
每个竹笼里有七个麻雀,
总共有多少麻雀?”
老头数是7,手杖数是7x7=49,树杈数是7x7x7=49x7=343,竹篮数是7x7x7x7=343x7=2401,竹笼数是7x7x7x7x7=2401x7=16807,麻雀数是7x7x7x7x7x7=16807x7=117649。总共有十一万七千六百四十九只麻雀。七个老头能提着十一万多只麻雀遛弯儿,可真不简单啊!若每只麻雀按20克算,这些麻雀有2吨多重呢!
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