bai 12:Mot vuon co so cay buoi bang 1phan2 cay cam,biet so cay cam bang so chan lon nhat co 3 chu so.Hoivuon do co tat ca bao nhieu cay buoi va cam?
bai 13:tim tich cua so nho nhatco ba chu so khac nhau voi so chan lon nhat co mot chu so.
bai 14:tim mot so,biet rang giam so do di 5 lan sau do them 10 don vi thi duoc so le nho nhat co hai chu so.
bai 15:tim mot so biet rang neu gap so do len 4 lan,duoc bao nhieu lai gap len 6 lan thi duoc 360.
Tim mot so . Biet rang tich cua so do voi so lon nhat co mot chu so la 126
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tim mot so co 2 chu, biet rang neu giam so do di 3 lan thi duoc mot so co 2 chu so .so nay co tong cua 2 chu so la 15 va chia het cho 8
trong mot phep du ,biet so chia la so chan lon nhat co mot chu so, thuong bang 245 va biet so du la so lon nhat co the co .tim so bi chia cua phep ting do?
tim cac so co hai chu so,biet rang moi chu so co tich hai chu so bang 18 va tong hai chu so bang 9
bài 1: a) binh nghi ra mot so .Biet rang so lon nhat co hai chu so hon so do la 65.tim so binh da nghi.
b) an nghi ra mot so. biet rang so do be hon so be nhat co ba chu so la 15. tim so an da nghi.
bai 2: tu ba chu so 5, 2, 3 an lap duoc so lon nhat va so be nhat co mat du ba chu so do , roi tinh hieu hai so vua lap duoc . hieu do la bao nhieu ???nhanh len nhe mik dang can rat gap
cho mot so co 5 chu so biet rang so do la so lien truoc cua so co sau chu so hay tim so lien truoc cua so co nam chu so da cho
tim mot so biet rang so do tru di so lon nhat co hai chu so thi duoc so lien sau cua so benhat co bon chu so khac nhau
Tim mot so co ba chu so biet trung binh cong cua ba so do bang 2va chu so hang tram bang tong cac chu so hang chuc va hang don vi