Các câu hỏi tương tự
tim mot so co 3 chu so biet , so do duoc viet boi 3 chu so 3 , 7 , 9 va khi xoa so 3 cua so do di ta duoc so moi , dem so moi cong voi so phai tim ta duoc tong bang 818
tim mot so co ba chu so biet rang neu xoa chu so hang chuc di ta duoc so moi kem so ban dau 210 don vi tim so do
cho mot so co ba chu so ma chu so hang tram la 4. neu xoa bo chu so 4 nay di, ta duoc 1 so co hai chu so. Biet tong cu so co ba tru so da cho va so co hai chu so co duoc sau khi xao chu so 4 la 450. Tim ba chu so da cho ban dau
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 so co ba cet hu so vi boi ba chu so 1;7;9 biet rang neu xoa di chu so 1 cua no ta duoc mot so kem so da cho la 712 dơn vi
tim mot so co bon chu so biet rang khi viet them chu so 3 vao ben trai so do thi duoc so moi gap 9 lan so phai tim
tim mot so co 4 chu so biet rang khi viet them chu so 3 vao ben trai so do thi duoc so moi gap 7 lan so phai tim
tim mot so biet rang khi viet them chu so 6 vao ben phai so do ta duoc so moi hon so cu la 2562 don vi
tim so co bon chu so;biet rang khi viet them chu so 2 vao ben phai so do thi duoc so moi co nam chu so hon so phai tim 11306 don vi