Unit 12 · Multi-Step Conditional Reasoning
Shape Sequences — Find the Rule Violation
Lesson 8 of 16
About this lesson
Here is a pure rule-application challenge: two simple rules about shape sequences, and four possible sequences to test. The correct approach is methodical — go through each sequence position by position, trigger each rule whenever a square or triangle appears, and check whether the next required shape is actually there.
Chapters
Question
In a game, players take it in turns to draw shapes in a line.
The following rules apply (going from left to right):
- The shape immediately after a square must be a circle.
- The second shape after a triangle must be a square.
Which one of the following sequences is not allowed?
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