PYQ Vault
EbooksTutor

Day 159: NDA Maths

5 questions. Try each one first, then open its answer.

  1. Question 1

    Matrices & Determinants. Asked once: NDA 2 2017 (same type asked 2 times)

    27
    The system of equations kx+y+z=1kx + y + z = 1, x+ky+z=kx + ky + z = k and x+y+kz=k2x + y + kz = k^2 has no solution if kk equals

    Tap an option to check your answer.

  2. Question 2

    Permutation & Combination. Asked once: NDA 1 2019 (same type asked 2 times)

    13
    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 can be formed by joining the points?

    Tap an option to check your answer.

  3. Question 3

    Quadratic Equations. Asked once: NDA 1 2021 (same type asked 2 times)

    43
    If one root of 5x2+26x+k=05x^2+26x+k=0 is reciprocal of the other, then what is the value of kk?

    Tap an option to check your answer.

  4. Question 4

    Quadratic Equations. Asked once: NDA 1 2021 (same type asked 2 times)

    113
    If kk is one of the roots of the equation x(x+1)+1=0x(x+1)+1=0, then what is its other root?

    Tap an option to check your answer.

  5. Question 5

    Statistics. Asked once: NDA 1 2021 (same type asked 2 times)

    111
    For which of the following sets of numbers do the mean, median and mode have the same value?

    Tap an option to check your answer.