Four people sit in a row: M is immediately left of N, and O is immediately right of N. Where can P sit?
- A. only at the left end
- B. only at the right end
- C. at either end of the block M, N, O
- D. between M and N
Explanation
The clues lock M, N and O into a fixed block in that order, so the only free positions for P are before M or after O. P cannot break into the block, since M, N and O are described as immediately adjacent. Identifying the fixed block first is the standard opening move.
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