Question

If gcd of 864 and 720 is 2nd multiple of a number ,then the number is

Answer 1

$\frac{864}{720} \\ 720)864(1 \\ \: \: \: \: \: \: \: \: \frac{720}{144}$
$144)720(5 \\ \: \: \: \: \: \: \: \: \frac{720}{0}$
the number is 144