tim so co 2 chu so biet rang neu ta viet them vao giua so do 1 so co 2 chu so kem so phai tim mot don vi thi so moi gap 91 lan so phai tim
tim so co 2 chu so biet rang neu ta viet them chu so 1 vao giua 2 chu so cua so do ta duoc so moi gap 9 lan so phai tim
tim so co hai chu so biet rang neu ta viet them chu so 1 vao giua 2 chu so cua so do ta duoc so moi gap 9 lan so phai tim
Tim 1 so co chu so, biet rang neu viet them vao giua so do 1 so co 2chu so kem so phai tim 1 don vi thi duoc so moigap 91 lan so phai tim
tim so co hai chu so biet rang neu ta viet them chu so 1 vao giua hai chu so cua so do ta duoc so moi gap 9 lan so phai tim
tim mot so co hai chu so biet rang neu viet them vao giua so do mot so co hai chu so kem so phai tim 1 don vi thi duoc mot so moi gap 91 laan so phai tim tim hai so
tim so tu nhien co 2 chu so biet rang neu viet chu so 0 xen giua chu so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so can tim . Neu viet them chu so 1 vao ben trai so vua nhan duoc thi so do gap len 3 lan . So can tim la
tim 1 so co 2 chu so biet rang neu viet them chu so 0 vao giua hang chuc va hang don vi ta duoc 1 so moi gap 6 lan so phai tim
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