Question

Who is brightest amongst all?

• A. B
• B. P
• C. R
• D. Cannot be decided
• A. P
• B. Q
• C. R
• D. Cannot be decided
• A. 15
• B. 25
• C. 27
• D. Cannot be decided

Answer 1

The Correct Option is B

The given problem involves comparing the brightness of students from two different schools: Don School and Elite School. Let's analyze the conditions: 

• Condition 1: Q is brighter than R but duller than the Don School student who is brighter than A.
• Condition 2: The same Don School student is duller than P but is brighter than C.

Let's determine the brightest student:

• From Condition 1, there is a Don School student brighter than A who is also brighter than Q but duller than P. Thus, Q is concluded to be brighter than R but not the brightest among all.
• From Condition 2, this Don School student is brighter than C and duller than P. Therefore, P is brighter than this Don School student.

Conclusion: As P is established to be brighter than the brightest Don School student considered in both conditions, P is the brightest amongst all.

Answer 2

To determine the dullest student among P, Q, and R from Elite School, we'll analyze the given condition:

The information states:

1. Q is brighter than R.

2. Q is duller than a Don School student who is brighter than A and C, but duller than P.

Let's denote this Don School student as X. Hence, we have the following order based on brightness:

• P is brighter than X.
• X is brighter than Q.
• Q is brighter than R.

Based on these relationships:

• In terms of brightness: P > X > Q > R

Therefore, among the Elite School students, the order is:

• Q > R

Concluding that R is the dullest student among P, Q, and R.

Answer 3

To determine how many students are finally in the class, let's analyze the information:

1. Initially, there were 10 students in the class when Rafael entered.
2. 5 students entered the class between Roger and Rafael. 
3. Total 10 students entered after Roger.

Based on this information, we can break it down as follows:

1. Let the number of students in the class when Roger enters be X.
2. Rafael enters when there are 10 students in the class.
3. Between Roger and Rafael, 5 students enter. Therefore, when Rafael enters, there are X + 5 = 10 students.
4. This means X = 5. So, Roger was the 5th student.
5. After Roger, a total of 10 students entered. Therefore, after Rafael, there are 10 - 5 = 5 students left to enter.

However, we cannot determine the exact final number of students because we do not know how many students entered before Roger. This missing data makes it impossible to ascertain the total number of students. Thus, the most suitable answer is:

Cannot be decided