1
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Let $A = \left| {\begin{array}{*{20}{c}} p&q\\ r&s \end{array}} \right|$
where p, q, r and s are any four different prime numbers less than 20. What is the maximum value of the determinant?
2
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
If A and B are square matrices of order 2 such that det(AB) = det(BA), then which one of the following is correct?
3
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
What is cot 2x cot 4x - cot 4x cot 6x - cot 6x cot 2x equal to
4
NDA Mathematics 18 April 2021
MCQ (Single Correct Answer)
+2.5
-0.83
If M is the mean of n observations x1 - k, x2 - k, x3 - k, _ _ _, xn - k, where k is any real number, then what is the mean of x1, x2, x3, _ _ _, xn?
Paper analysis
Total Questions
Mathematics
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