Mathematics NDA/NA SOLVED PAPER 2019 (II) (01 to 50)

Total Questions: 50

11. What is the value of the determinant

Correct Answer: (c) 24
Solution:

12. What are the values of x that satisfy the equation:

(a) − ± 2 √3
(b) − ± 1 √3
(c) − ± 1 √6
(d) − ± 2 √6

Correct Answer: (d)
Solution:

13. Solve it?

Correct Answer: (a) 0
Solution:

14. Find the value?

Correct Answer: (a) a null matrix
Solution:

15. Let m andn (m < n) be the roots of the equation x² − 16x + 39 = 0. If four terms p, q, r and s are inserted between m and n to form an AP, then what is the value of p + q + r + s?

Correct Answer: (c) 32
Solution:

16. Under which one of the following conditions will the quadratic equation x² + mx + 2 = 0 always have real roots?

Correct Answer: (c)
Solution:

17. Find the value?

Correct Answer: (c) 2i
Solution:

18. Find the value?

Correct Answer: (d) 2
Solution:

19. In a school, 50% students play cricket and 40% play football. If 10% of students play both the games, then what per cent of students play neither cricket nor football?

Correct Answer: (c) 20%
Solution:

20. Find the value?

Correct Answer: (c) {2}
Solution: