将426个乒乓球装在三种盒子里。大盒每盒装25个，中盒每盒装20个，小盒每盒装16个。现共装了24盒，求用了多少个大盒?A.1 B.2 C.3 D.4

作者: tihaiku 人气: - 评论: 0

问题将426个乒乓球装在三种盒子里。大盒每盒装25个，中盒每盒装20个，小盒每盒装16个。现共装了24盒，求用了多少个大盒?

选项 A.1 B.2 C.3 D.4

答案 B

解析设用了大盒x个、中盒y个，则小盒(24-x-y)，)个，由题意可得，25x+20y+16(24-x-y)=426，化简得到，9x+4y=42，由于4y和42是偶数，则9x也是偶数，x是偶数。得出x=2时，y=6；其余情况均不成立，选B。

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将426个乒乓球装在三种盒子里。大盒每盒装25个，中盒每盒装20个，小盒每盒装16个。现共装了24盒，求用了多少个大盒?A.1 B.2 C.3 D.4

相关内容：426个,乒乓球,盒子,大盒,中盒,现共

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