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 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 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 viet them chu so 1 vao giua 2 chu so thi ta duoc so moi gap 9 lan so phai tim

tim so co hai chu so biet rang neu ta viet hem chu so 1 vao giua ta duoc so moi gap 9 lan so phai tim

1.Cho so N la so co hai chu so chia het cho 3.Neu viet xen so 0 vao giua hai chu so do roi cong no voi hai lan chu so hang chuc cua so N ta duoc so moi gap 9 lan so N.Tim so do

2.Tong hai so thap phan la 60,1.Neu dich dau phay cua so nho sang ben phai mot hang roi dem tru di so lon thi ta duoc 219,52.Tim hai so do.

3.Tim so co hai chu so biet neu ta them so 33 vao giua hai chu so do thi duoc mot so moi gap so phai tim 89 lan.

tim mot so co hai chu so biet rang ta viet them chu so 1 va giua hai chu so cua so do ta duoc so moi gap 9 lan so phai tim. trai loi: so phai tim la ... cac giai luon nhe!

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

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.