CSATLogical ReasoningSequence Pattern Reasoning2014

Consider the following figures: Change in positions of beads in the four figures above follows a sequence. Following the same sequence, which of the figures below should appear as the fifth figure above?

Correct Answer: Option B

Explanation

To solve this intuitively, I don't need to work out the complex rotation patterns for all four corners. I just need to find one stable anchor.\n\n1. **Analyze the Bottom-Right Corner:**\n * In Figure 1, the black half is at the **Bottom**.\n * In Figure 2, it is at the **Bottom**.\n * In Figure 3, it is at the **Bottom**.\n * In Figure 4, it is at the **Bottom**.\n\n2. **Deduction:** The rule for this corner is 'No Change'. Therefore, in the 5th figure, the black half must also be at the **Bottom**.\n\n3. **Check Options:**\n * Option A: Black half is on the Right. (Eliminate)\n * Option B: Black half is at the **Bottom**. (Keep)\n * Option C: Black half is on the Right. (Eliminate)\n * Option D: Black half is on the Right. (Eliminate)\n\nSince only Option B preserves the constant position of the Bottom-Right bead, it must be the answer. No further checking is required.
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