Answer:
i think its 87
Step-by-step explanation:
let , $a\ge b$
$\therefore a=G\cdot m$ and $b=G\cdot n$
$a-b=Gm-Gn=G(m-n)$
Now, $\gcd(a-b,b)$ clearly is, $G$
Impossible
This diagram is not correctly stating the question
Do you want me to solve it on a graph???