# Matrices Self Study Quiz

10 Questions  I  By Proprofsquizschool
Quiz on the Self Study topic of Matrices done by Ong Tiet Ho, Hwa Chong Institution, 3S422 as Part III of the June Self Study Modules. Topics tested include the basics of matrices, addition, subtraction and multiplication of matrices.

Changes are done, please start the quiz.

 1 Farmer A had 4 ducks, 3 chickens and 2 cows while Farmer B had 9 cows, 4 pigs and 7 chickens. A matrix can be formed to represent the above data. Which one of the following would be a possible order of the matrix?
 A. 2 x 1
 B. 2 x 2
 C. 2 x 3
 D. 2 x 4
 2 Which of the following is impossible?
 A. Scalar Multiplication
 B. Matrix Multiplication
 C. Scalar Division
 D. Matrix Division
 3 What is an identity matrix and why is it called an identity matrix?
 A. An identity matrix is a matrix with all diagonal entries as 1 and all non-diagonal entries as 0. It is called an identity matrix as it would give a null matrix as a result when multiplied by other matrix.
 B. An identity matrix is a matrix with all diagonal entries as 1 and all non-diagonal entries as 0. It is called an identity matrix as it would not change the original matrix when multiplied by it.
 C. An identity matrix is a matrix with all its entries as 0. It is called an identity matrix as it would give a null matrix as a result when multiplied by any other matrix.
 D. An identity matrix is a matrix with all its entries as 0. It is called an identity matrix as it would not change the original matrix when multiplied by it.
 4 (9  0  1  3  4)           (0  7  3  0)A = (5  7  8  2  4)           (1  3  6  2)      (3  4  2  7  0)     B = (7  8  9  2)                                    (7  4  3  8)                                    (8  3  2  5)Which of the following is possible?
 A. A + B
 B. A - B
 C. A x B
 D. A / B
 5 Which of the following matrix operations is commutative?