Here’s a question from 5lb, in the answer he says that **“x + y is divisible by 6”** is the only possibility.

He used some initial 3 multiples. But what if I say

**x = 48*18** and **y = 48*12** i.e **48th** multiples of both. Now **xy** is divisible by **48**. How to tackle this type of situation, this is not the only one, I have found many other questions like this.