CSIR NET 2020 Mathematical Science Prev. Yr. Paper (30-Nov-2020)

Question 1

A 3.1 m &times; 2.2 m &times; 2.1 m block of granite is cut to have maximum number of 3 m &times; 2 m sized slabs having thickness of 4 cm. These slabs are used to make a 1.5 m wide pavement. What is the maximum length (in meters) of pavement that can be made using these slabs?

Accepted Answer

236

Answer

200

Answer

400

Answer

440

Question 2

Milk rises rapidly at boiling point because

Accepted Answer

its bulk density rapidly decreases and it becomes more buoyant at boiling point

Answer

it becomes hotter than the vessel at boiling point

Answer

its temperature rapidly increases at boiling point

Answer

its vapour pressure rapidly decreases at boiling point

Question 3

In an examination, each of the two brilliant students got 100 out of 100 and each of the remaining six students scored less than 12. There is no provision of getting negative marks. If N = Median score of the students and M = Mean score of the students, which of the following is true?

Accepted Answer

M > 2N

Answer

3N/2 < M &le; 2N

Answer

N &le; M &le; 3 N/2

Answer

From the above information nothing can be said about the relationship between the Median score of the students and the Mean score of the students.

Question 4

Along the common radial direction from the center of two concentric circles of radii 100 m and 150 m, point A is on the circumference of the inner circle and point B is on the circumference of the outer circle. The points A and B start moving on the respective circles with a speed of 8 m/s, at the same instant, but in opposite directions. After how many seconds, approximately, would they again cross each other along a common radial direction?

Accepted Answer

47

Answer

31

Answer

37

Answer

53

Question 5

Which combination of square tiles shown below can produce the given pattern on the floor?

Accepted Answer

""

Answer

Answer

Answer

CSIR NET 2020 Mathematical Science Prev. Yr. Paper (30-Nov-2020)

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