ECAT Mathematics Online Test With Answers

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ECAT Mathematics Online Test

Sr. # Questions Answers Choice
1 Roots of the equation x2- x = 2 are {2, -1} {1, 0} {2, 1} {-2, 1}
2 Roots of the equation x2+ 7x + 12 = 0 are {3, -4} {-3, 4} {3, 4} {-3, -4}
3 Roots of the equation x2- 7x + 10 = 0 are {2, 5} {-2, 5} {2,5} {-2,-5}
4
5 Cofactor of an element aijis defined by (-1)<sup>i+j</sup>|A| (-1)<sup>i+j</sup>M<sub>ij</sub> (-1)<sup>i+j</sup>M<sup>-1</sup> None of these
6 Minor of an element aijis denoted by M<sub>ij</sub> A<sub>ij</sub> |A| None of these
7 0 1 2 3
8 2 4 6 8
9 The additive inverse of a matrix A is None of these
10 The transpose of a zero matrix is a ______ Column matrix Zero matrix Row matrix Scalar matrix
11 The transpose of a row matrix is a ______ Zero matrix Diagonal matrix Column matrix Row matrix
12 The transpose of a column matrix is a ______ Zero matrix Diagonal matrix Column matrix Row matrix
13 Zero matrix Diagonal matrix Column matrix Scalar matrix
14 3 x 2 2 x 3 3 x 3 2 x 2
15
16 If the matrices A and B are conformable for multiplication then (AB)t= ______ AB A<sup>t</sup>B<sup>t</sup> B<sup>t</sup>A<sup>t</sup> A<sup>t</sup>B
17 An upper triangular matrix A lower triangular matrix A diagonal matrix A null matrix
18
19 If order of A is m x n, then order of Atis m x m n x n m x n n x m
20 Matrices are represented by Natural numbers Real numbers Small letters Capital letters
21 At -A A A-1
22 The number of non zero rows in echelon form of a matrix is called Order of matrix Rank of matrix Row operation None of these
23 If A is a non singular matrix then A-1= ______
24 16 None of these
25 If A is singular then |A| = ______ 1 0 2 None of these
26 0 1 -2 10
27 1, 2, 3 1, 5, 9 2, 5, 8 3, 6, 9
28 Null matrix Triangular matrix Unit matrix Rectangular matrix
29 Diagonal matrix Scalar matrix Triangular matrix Identity matrix
30 Diagonal matrix Scalar matrix Triangular matrix Identity matrix
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