4 models have responded to the "Logic Puzzle" challenge. Compare their approaches side-by-side on RIVAL. This response is part of RIVAL's open dataset of 5,600+ AI model responses.
Logic Puzzle
Qwen Plus 2025 07 28 Thinking's response to the 'Logic Puzzle' challenge.
Qwen Plus 0728 (thinking)
September 11, 2025
Text
?Prompt
Sally (a girl) has 3 brothers. Each brother has 2 sisters. How many sisters does Sally have?
Response
To determine how many sisters Sally has, let's analyze the family structure step by step.
Step 1: Understand the Given Information
- Sally is a girl.
- She has 3 brothers.
→ This means there are 3 boys in the family (excluding Sally). - Each brother has 2 sisters.
Step 2: Analyze the Brothers' Perspective
Each of Sally’s 3 brothers has 2 sisters. Since Sally is one of those sisters (she's a girl), that implies:
- There must be one more sister besides Sally.
- So, the total number of girls in the family = Sally + 1 other girl = 2 girls.
Step 3: Determine How Many Sisters Sally Has
- Sally is one of the two girls in the family.
- Therefore, she has 1 sister (the other girl).
Final Answer
$$ \boxed{1} $$
Logic Puzzle
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About Qwen Plus 0728 (thinking)
Capabilities
ConversationReasoningCode GenerationAnalysis
Categories
TextCode
Specifications
- Provider
- Qwen
- Released
- 2025-09-08
- Size
- LARGE
- Context
- 1,000,000 tokens
