Tìm so co hai chu so biet rang neu ta viet them chu so 2 vao ben trai va ben phai so do ta duoc so moi gap 36 lan so phai tim.

tim mot so tu nhien co 2 chu so biet rang neu viet them chu so 1 vao ben trai va ben phai so do thi duoc so co 4 chu so,lon gap 32 lan so da cho

tim 1 so co 2 chu so biet rang neu viet them vao ben trai ben phai so do 1 chu so 5 ta duoc 1 so moi co 4 chu so gap 75 lan so phai tim

tim mot so co hai chu so biet rang neu viet them chu so 0 xen vao giua chu so hang chuc va hang don vi cua so do ta duoc so moi va neu viet them chu so hai vao ben trai so moi thi ta duoc mot so gap 6 lan so moi do

tim so co ba chu so biet rang neu viet them chu so 1 vao ben phai so do thi ta duoc mot so gap 3 lan so co duoc bang cach viet them chu so 2 vao ben trai so do

tim mot so tu nhien co hai chu so biet rang neu viet them mot chu so 2 vao ben trai va mot chu so hai vao ben phai so do thi ta duoc mot so lon gap 153 so ban dau

tim mot so co hai chu so biet rang neu viet them chu so 3 vao ben trai so do ta duoc so moi [co 3 chu so } = 5 lan so phai tim

mot so tu nhien co 5 chu so. biet rang viet them 1 vao ben phai va them chu so1 vao ben trai thi ta duoc so moi lon gap 3 lan so ban dau. tim so ban dau

tim mot so co ba chu so biet rang neu viet them chu so 5 vao ben trai so do thi ta duoc so moi ma tong cua so moi va so da cho bang 5472. so phai tim la......