math jj no.9--check!

9. A integer, when divided by 6, has remainder 2 and when divided by 8 has remainder 4. What's the possible remainder when it is divided by 48. <I chose 20>

n=6A+2   n=8B+4     (A,B是整数) 

—>  n=24(A-B)-4    （A-B是整数）

所以余数是20

题目是不是应该divided by 24？请整理数学jj的cder check~~thanks