Complex Arrangements — Mains Strategy

Mains Strategy

Treat the written questions here as reasoning demonstrations, not actual CSAT Mains questions. The goal is to make a deduction inspectable. Start with a legend identifying people, positions and attributes, then translate the clues into a compact list or table. State any rule that makes assignments one-to-one.

Show a decisive inference rather than narrating every trial. For example, placing an adjacent pair may leave only one legal interior slot for another person. Explain why alternative slots fail, citing the specific constraint. If you split into branches, name the assumption at the start of each and show the contradiction or surviving layout at the end.

The conclusion should match the question's logical demand. A valid arrangement proves possibility, whereas a necessary relationship requires a proof or a complete relevant comparison. Where more than one layout survives, report that fact and identify any relation common to them. For a counting exercise, state the treatment of rotations and reflections. This structure makes the solution reproducible and separates legitimate deduction from an unstated convention or an attractive drawing.