Qwen: Qwen3 235B A22B 2507
Let's break it down:
- Sally is a girl.
- She has 3 brothers.
- Each of her brothers has 2 sisters.
Now, think about the brothers' perspective:
Each brother is a sibling to Sally and shares the same siblings.
So, when it says each brother has 2 sisters, those are the girls in the family. Since Sally is one girl, and there are 2 sisters in total from the brothers' point of view, that means there must be one other girl besides Sally.
Therefore, Sally has 1 sister.





