GMAT Problem Solving (PS) | When m is divided by 9, the remainder is 2. When m is divide

assume difference of 1 between m/9 and m/13 quotients
(m-2)/9-(m-8)/13=1
4m=71
assume difference of 2
4m=71+117=188
m=47
47+9*13=164
E
...

---