CSIR NET 2021 Mathematical Science Prev. Yr. Paper (16-Feb-2022)

Question 1

Section A has 24 students. If one student of this section is exchanged for another in section B, then the average mark of A is increased by 1.25, while that of B reduced by 1. The number of students in section B is

Accepted Answer

30

Answer

16

Answer

20

Answer

25

Question 2

The square of a two digit number, with non&hyphen;zero digits, is the number itself preceded by the digit C. Then C is

Accepted Answer

6

Answer

1

Answer

2

Answer

4

Question 3

A and B have coins of Rs.1, Rs. 2, Rs. 5 and Rs. 10, in the ratio 4 &ratio; 3 &ratio; 6 &ratio; 2 and 3 &ratio; 5 &ratio; 7 &ratio; 3, respectively. A has Rs.6/&hyphen; more than B. Which of the following can be the number of coins with A and B, respectively?

Accepted Answer

60, 54

Answer

42, 36

Answer

45, 54

Answer

60, 72

Question 4

Six indistinguishable balls are to be distributed amongst A, B and C, such that each gets at least one. Then the number of ways to make this distribution is

Accepted Answer

10

Answer

6

Answer

18

Answer

15

Question 5

A book has 40 pages and each page has x lines. If the number of lines were reduced by 2 in each page, the number of pages would increase by 10 for the identical text. What is the value of x?

Accepted Answer

10

Answer

7

Answer

20

Answer

30

CSIR NET 2021 Mathematical Science Prev. Yr. Paper (16-Feb-2022)

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