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UPSC Civil Services 2021 Prelims General Studies Paper II

Question : 5

Total: 80

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

Q and R
Q and U
Q and T
T and U

Validate

Solution:

Given that we have seven books P, Q, R, S, T, U, and V.
Basically, this question is based on its cover's color, its condition, and its type. We can proceed step by step using the tabular form.
Statement 1:Based on the cover's color of books, i.e., R, Q, and T have blue covers and other books have red covers.

Name	P	Q	R	S	T	U	V
Cover's Color	Red	Blue	Blue	Red	Blue	Red	Red

Statement 2: Based on the condition of books, i.e., Only S and U are new books and the rest are old.

Name	P	Q	R	S	T	U	V
Cover's Color	Red	Blue	Blue	Red	Blue	Red	Red
Condition	Old	Old	Old	New	Old	New	Old

Statement 3: Based on the type of books, i.e., P, R, and S are law reports; the rest are Gazetteers.

Name	P	Q	R	S	T	U	V
Cover's Color	Red	Blue	Blue	Red	Blue	Red	Red
Condition	Old	Old	Old	New	Old	New	Old
Type	Law reports	Gazetteers	Law reports	Law reports	Gazetteers	Gazetteers	Gazetteers

On analyzing the final table we get two books of old gazetteers with blue covers, i.e., Q and T.
Hence Books of old Gazetteers with blue covers are Q and T.

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