Logic Puzzle

Qwen3 30B A3B Instruct 2507's response to the 'Logic Puzzle' challenge.

Qwen: Qwen3 30B A3B Instruct 2507

July 30, 2025

Text

?
Prompt

Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?

Qwen: Qwen3 30B A3B Instruct 2507Logic Puzzle

Qwen: Qwen3 30B A3B Instruct 2507

Let's break it down:

Now, since Sally is a girl and she has 3 brothers, those brothers are sharing the same siblings.

The key point: Each brother has 2 sisters.

Since Sally is one of the sisters, and each brother has 2 sisters, that means there must be one other sister besides Sally.

So, total sisters = Sally + 1 other sister = 2 sisters.

Therefore, Sally has 1 sister.

ConversationReasoningCode GenerationAnalysis