NDA questions
2827 published questions with worked solutions.
- What are the roots of the equation |x^2-x-6|=x+2?
- If A= bmatrix 0 & 1 1 & 0 bmatrix , then the matrix A is a/an
- The common roots of the equations z^3+2z^2+2z+1=0 and z^ 2017 +z^ 2018 +1=0 are
- If C(20, n+2)=C(20, n-2), then what is n equal to?
- There are 10 points in a plane. No three of these points are in a straight line. What is the total number of straight lines which...
- The equation px^2+qx+r=0 (where p, q, r, all are positive) has distinct real roots a and b. Which one of the following is correct?
- If A= , , , then the power set of A is
- If A is an identity matrix of order 3, then its inverse (A^ -1 )
- A is a square matrix of order 3 such that its determinant is 4. What is the determinant of its transpose?
- From 6 programmers and 4 typists, an office wants to recruit 5 people. What is the number of ways this can be done so as to...
- What is the number of terms in the expansion of [(2x-3y)^2(2x+3y)^2]^2?
- In the expansion of (1+ax)^n, the first three terms are respectively 1, 12x and 64x^2. What is n equal to?
- The numbers 1, 5 and 25 can be three terms (not necessarily consecutive) of
- The sum of (p+q)^ th and (p-q)^ th terms of an AP is equal to
- If A is a square matrix of order n>1, then which one of the following is correct?
- What is the least value of 25 , cosec ^2x+36 ^2x?
- What is the value of 34^ 236^ - 56^ 124^ 28^ 88^ + 178^ 208^ ?
- 54^ can be expressed as
- If + =p, then what is ^2(2 ) equal to?
- What is the value of ^ -1 4 5 + ^ -1 5 4 - 2 ?