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Logical Puzzles Hard 2 min

Six books P, Q, R, S, T and U are arranged on a shelf. P is before Q. R is immediately after S. T is after Q. U is before P. Which of the following must be true?

Hint
Combine the ordering restrictions.

Answer

U is before Q.

Explanation

Since U is before P and P is before Q, U must also be before Q.

Step-by-Step Solution

U < P.
P < Q.
Therefore U < Q.
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