UPSC Prelims 2021·CSAT·Logical Reasoning·Arrangement and Puzzles

Seven books P, Q, R, S, T, U and V are placed side by side. R, Q and T have ( ) blue covers and other books have red covers. Only S and U are new books and the rest are old. P, R and S are law reports; the rest are Gazetteers. Books of old Gazetteers with blue covers are

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  1. AQ and R
  2. BQ and U
  3. CQ and TCorrect
  4. DT and U

Explanation

To find "old Gazetteers with blue covers," we apply the conditions step-by-step:

  1. Blue Covers: R, Q, T
  2. Gazetteers: From R, Q, T, we eliminate R (which is a Law Report). This leaves Q and T.
  3. Old Books: From Q, T, both Q and T are old books (since only S and U are new).

Therefore, Q and T are the old Gazetteers with blue covers.

Option C (Q and T) matches this conclusion.

Logical Reasoning: Seven books P, Q, R, S, T, U and V are placed side by side. R, Q and T have ( ) blue covers and other books have red cov
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