tim 1 so co 2 c/s biet so do tru di tich cac c/s cua no thi duoc 35

Tim so co hai c/s biet neu viet them c/s 0 vao  giua 2 c/s cua so do ta duoc so moi gap 6 lan so da cho

tim stn co 4 c/s .biet rang khi viet them c/s 5 vao ben phai so do ta duoc 1 so gap 5 lan so nhan duoc khi viet them c/s 1 vao ben trai so can tim

tim 1 so co 2 c/s biet neu them vao ben phai c/s 1 thi so do lon hon khi them vao ben trai c/s 1 la 36 don vi

tim stn co 5 c/s biet so do bang 45 lan tich cac c/s cua no

tim so tu nhien co 3 C/S,biet rang binh phuong cua C/S hang chuc bang tich cua 2 C/S kia va so tu nhien do tru di so gom 3 C/S ay viet theo thu tu nguoc lai bang 495

Tim so co hai c/s biet tong hai c/s cua no la 13 .neu do I vi tri hai c/scuba so do cho nhau at duoc so moi hon so ban dau 9 don vi

tim 1 so co 5 c/s biet rang khi viet c/s 1 vao ben trai hoac ben phai duoc 2 so co 6 c/s ma so no gap 3 lan so kia

Tim 1 so co 2c/s,biet rang neu them c/s 0 vao giua 2 c/sdo thi duoc 1 so co 3 c/s gap 9 lan so ban dau