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Class 12 Mathematics Chapter 3 Matrices Quiz 7 (20 MCQs)

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1. When does a system of equations have infinite solutions?
2. The point of intersection of the lines:x+3y=5 and x-2y=-5 is
3. A matrix which have only one ROW is called
4. If A and B are two matrices of orders 3X3, then A+B is of order
5. Rectangular matrix:(m= no. of rows, n= no' of columns)
6. Singleton Matrix has determinant of (a)
7. Using determinants, find the equation of the line joining the points (1, 2) and (3, 6).
8. If a matrix has 6 elements, then number of possible orders of the matrix can be
9. The points (1, 0), (6, 0) and (0, 0) are collinear
10. A and B are invertible matrices of the same order such that |(AB)-1| = 8, If |A| = 2, then |B| is
11. A diagonal matrix, all of whose diagonal elements are 1, is called:
12. If A is an SKEW-SYMMETRIC MATRIX, then $A^T=$
13. Determine the product of the matrices E = [[1, 2], [3, 4]] and F = [[5, 6], [7, 8]].
14. Find the inverse of the matrix A = [[1, 2], [3, 4]].
15. Look at the problem on the half-sheet I gave you. Answer it fully. When you do, call me over and check it. I will give you the correct "answer" below if you get it right.
16. 1). For a skew symmetric even ordered matrix A of integers, which of the following will not hold true:
17. Solve $-2\left|x-3\right|=-10$
18. A square matrix is known as symmetric matrix if
19. Find the value of a, if the division of ax$^{3}$ + 9x$^{2}$ + 4x-10 by x + 3 leaves a remainder 5.
20. Solve the system of equations using Cramer's Rule:3x-y = 7 and 5x + 2y = 19.
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