Tim so tu nhien co 2 chu so biet rang
a. So do gap 6 lan tong cac chu so cua no
b. So do gap 7 lan tong cac chu so cua no
c. So do gap 8 lan tong cac chu so cua no
d. So do gap 9 lan tong cac chu so cua no
Tim so tu nhien co hai chu so,biet rang so do lon gap 6 lan tong cac chu so cua no
tim so tu nhien co 3 chu so, biet so do gap 20 lan tong cac chu so cua no
tim so tu nhien co 3 chu so biet rang so do gap 10 lan tong cac chuso cua no la 80
tim so co 3 chu so biet rang so do gap 11 lan tong cac chu so cua no
tim so co 2 chu soac chu so cua no, biet rang so do gap 8 lan tong cac chu so cua no.
tim so tu nhien co hai chu so biet rang so do chia cho tong cac chu so cua no thi duoc thuong cung la tong cac chu so cua no
tim so co 2 chu so, biet rang so do gap 8 lan tong cac chu so cua no
tim so co hai chu so biet rang so do gap 8 lan tong cac chu so cua no