tim so tu nhien co hai chu so biet rang neu viet chu so 0 xen giua so hang chuc va hang don vi cua so do ta duoc so moi gap 10 lan so phai tim neu viet chu so 1 vao ben traiso vua nhan thi so do gap len 3 lan
tim so co hai chu so biet rang neu viet them chu so 0 xen vao giua hai chu so cua so do ta duoc so moi gap 66 lan so can tim.
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 so tu nhien co 2 chu so ,biet rang neu viet them 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.
Tim 1 so co 2 cs, biet rang neu viet them cs so 0 vao giua 2 so cus so do ta duoc so moi gap 7 lan so phai tim
tim so tu nhien co hai chu so biet rang neu ta them chu so 0 vao giua hai chu so thi ta duoc so moi co ba chu so gap 7 lan so ban dau?
tim so co 2 chu so biet rang neu viet them vao truoc va sau so do 1 chu so 1 ta duoc 1so co 4 chu so gap 23 lan so phai tim
tim tat ca cac so co 2 chu so biet rang neu viet them vao giua hai so do mot chu so 3 thi duoc mot so moi gap 11 lan so can tim
tim so co 2 chu so biet rang neu viet xen chu so 0 vao giua 2 chu so cua so do thi ta duoc so do bang 7 lan so phai tim