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 co 2 chu soac chu so cua no, biet rang so do gap 8 lan 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 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
tim mot so co hai chu so biet rang co do lon gap 8 lan tong cac chu so cua no .
tim so co 2 chu so biet rang so do lon gap 8 lan tong cac chu so cua no
tim 1 so co 2 chu so biet rang so do gap 9 lan tong cac chu so cua no
tim so co hai chu so biet rang so do lon gap 8 lan tong cac chu so cua no