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dksunshine
2 năm trước
một số học sinh khối 6 và 7 trường THCB được tham gia chuyên đề , ban tổ chức dự định xếp các học sinh thành các hàng sao cho số học sinh trong mỗi hàng đều bằng nhau .Nếu xếp tăng 3 hàng mỗi hàng giảm 4 học sinh so dự định lúc đầu thì vừa đủ .Nếu giảm 2 hàng , mỗi hàng tăng 5 học sinh so vs dự định lúc đầu thì thiếu 10 học sinh . Tính số học sinh khối 6 và 7 đc tham gia trong chuyên đề
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