The average marks obtained by a class in an examination were calculated as 30.8 . However, while checking the marks entered, the teacher found that the marks of one student were entered incorrectly as 24 instead of 42 . After correcting the marks, the average becomes 31.4. How many students does the class have?

Consider the relationships among $P, Q, R, S$, and $T$ :

$\bullet$ $P$ is the brother of $Q$.

$\bullet$ $S$ is the daughter of $Q$.

$\bullet$ $T$ is the sister of $S$.

$\bullet$ $R$ is the mother of $Q$.

The following statements are made based on the relationships given above.

(1) $R$ is the grandmother of $S$.

(2) $P$ is the uncle of $S$ and $T$.

(3)$R$ has only one son.

(4) $Q$ has only one daughter.

Which one of the following options is correct?

According to the map shown in the figure, which one of the following statements is correct?

Note: The figure shown is representative.

"I put the brown paper in my pocket along with the chalks, and possibly other things. I suppose every one must have reflected how primeval and how poetical are the things that one carries in one's pocket: the pocket-knife, for instance the type of all human tools, the infant of the sword. Once I planned to write a book of poems entirely about the things in my pocket. But I found it would be too long: and the age of the great epics is past."

(From G.K. Chesterton's "A Piece of Chalk")

Based only on the information provided in the above passage, which one of the following statements is true?