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实验小学五年级有学生若干人。若3人排一行最后余2人,7人排一行最后余2人,11人排一行最后也余2人。五年级至少有多少人?
实验小学五年级有学生若干人。若3人排一行最后余2人,7人排一行最后余2人,11人排一行最后也余2人。五年级至少有多少人?
发布时间:2020-08-16 14:20:34
实验小学五年级有学生若干人。若3人排一行最后余2人,7人排一行最后余2人,11人排一行最后也余2人。五年级至少有多少人?
网友回答
如果五年级人数减少2人,那么,按题中所说的三种方式列队正好没有剩余,也就是说五年级人数减少2人后,正好是3、7、11的公倍数。题目要求五年级至少有多少人,可以先求出3、7、11的最小公倍数,然后加2就行了。3、7、11的最小公倍数是3??1=231。因此,五年级至少有学生231+2=233(人)。
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