Mathmatics NDA/NA Solved Paper 2020-I (51-100)

Total Questions: 50

1. The number (1101101 + 1011011)₂ can be written in decimal system as

Correct Answer: (c) (200)₁₀
Solution:

2. What is the value of

Correct Answer: (a) 0
Solution:


3. Solve the following equation?

Correct Answer: (c) (1 + x)⁻¹ + (1 + y)⁻¹ + (1 + z)⁻¹ = 1
Solution:

4. Solve the following equation?


If AB = C, then what is the value of the determinant of the matrix A?

Correct Answer: (b) -14
Solution:


5. If 1.5 ≤ 𝓍 ≤ 4.5 then which one of the following is correct ?

Correct Answer: (d) (2𝓍 - 3)(2𝓍 - 9) ≤ 0
Solution:

6. Solve the following equation ?

Then the relation is

Correct Answer: (c) transitive only
Solution:

7. What is the value of the determinant

Correct Answer: (d) -4i
Solution:

8. Solve the following equation ?


Correct Answer: (c)
Solution:

9. What is the number of ways in which the letters of the word ‘ABLE’ can be arranged so that the vowels occupy even places ?

Correct Answer: (b) 4
Solution:

Maximum number of points of intersection of 2 non-overlapping circles = 2
So, maximum number of points of intersectionof 5 non- overlapping circles = 8+6+4+2 = 20.

10. What is the maximum number of points of intersection of 5 non-overlapping circles ?

Correct Answer: (c) 20
Solution: