Q. 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

Explanation : 

Seven Book P, Q, R, S, T, U & V Arrangement

From the given information, we know that R, Q and T have blue covers and other books have red covers. We also know that only S and U are new books and the rest are old. Finally, we know that P, R and S are law reports; the rest are Gazetteers.

Based on this information, we can conclude that Q and T are old Gazetteers with blue covers. This is because they both have blue covers (as stated in the first sentence), they are both old (since only S and U are new), and they are both Gazetteers (since P, R and S are law reports).