L4
Elimination Logic
排除法
Logic / 逻辑Grades G5 - G8
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What It Looks Like
Recognition signals — when you see these, think of this structure:
- 1Multiple constraints or clues
- 2Logic puzzles (who lives where, etc.)
- 3Questions best solved by ruling out options
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What It Really Tests
The core mathematical idea behind this structure:
Use constraints to systematically eliminate impossible options until only the answer remains.
使用约束系统地排除不可能的选项，直到只剩下答案。
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Why Students Get Stuck
Common mistakes to watch out for:
- ⚠Not tracking eliminated options systematically
- ⚠Missing some constraints
- ⚠Stopping before only one option remains
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Your First Step
How to begin thinking about problems with this structure:
List all possibilities, then cross out those that violate any constraint.
列出所有可能性，然后划掉违反任何约束的选项。
Related Structures
These structures share similar patterns or thinking approaches: