This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Mathematics Chapter 3 Matrices – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Mathematics Chapter 3 Matrices Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A is a skew symmetric matrix if A' =-A. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 2. Is diagonal matrix is a square matrix? A) Yes. B) No. C) All the above. D) None of the above. Show Answer Correct Answer: A) Yes. 3. Diagonal Matrix is: A) A Matrix which all entries are zero. B) A Matrix which entries are one. C) A Matrix which diagonal entries are not zero's and the entries outside the main diagonal are all zero's. D) None of the above. Show Answer Correct Answer: C) A Matrix which diagonal entries are not zero's and the entries outside the main diagonal are all zero's. 4. The system of equations x+y+z=0, 3x+6y+z=0, $\alpha$x+2y+z=0 has infinitely many solutions then $\alpha$ is equal to A) 7. B) 7/5. C) 5/7. D) 5. Show Answer Correct Answer: B) 7/5. 5. The system of equations, 4x$_{1}$+ x$_{2}$-3x$_{3}$-x$_{4}$=0, 2x$_{1}$+ 3 x$_{2}$+ x$_{3}$-5x$_{4}$=0, x$_{1}$-2x$_{ 2}$-2x$_{ 3}$+ 3x$_{ 4}$=0 has A) No solution. B) Only one solution. C) Infinite number of solutions. D) Only two solutions. Show Answer Correct Answer: C) Infinite number of solutions. 6. What is a Matrix? A) An equation of over 5 numbers or symbols. B) A rectangular array of numbers in rows and column. C) A method of finding the n$^{th}$ value of a series. D) A complicated number system. Show Answer Correct Answer: B) A rectangular array of numbers in rows and column. 7. Solve for y:2x + y = 12-3x + y = 2 A) -2. B) 8. C) -8. D) 2. Show Answer Correct Answer: B) 8. 8. You can multiply a 6X2 matrix by which matrix? A) 6X2. B) 2X12. C) 3X12. D) 6x3. Show Answer Correct Answer: B) 2X12. 9. A square matrix in which all the elements except at least the one element in the diagonal are zeros is said to be a A) Identical matrix. B) Null/zero matrix. C) Column matrix. D) Diagonal matrix. Show Answer Correct Answer: D) Diagonal matrix. 10. What is the area of a triangle with vertices (1, 2), (4, 5) and (7, 8)? A) 12. B) 6. C) 15. D) 9. Show Answer Correct Answer: D) 9. 11. Que es una matriz Triangular inferior A) Es una matriz cuadrada todos sus elementos situados por encima de la diagonal son cero. B) Es una matriz cuadrada todos sus elementos situados por debajo de la diagonal son cero. C) Es una matriz rectangular todos sus elementos situados por encima de la diagonal son cero. D) Es una matriz 2x3 todos sus elementos situados por encima de la diagonal son cero. Show Answer Correct Answer: A) Es una matriz cuadrada todos sus elementos situados por encima de la diagonal son cero. 12. El producto de dos matrices de orden 2x3 y 3x3 produce como resultado una matriz de orden: A) 2x3. B) 2x2. C) 3x2. D) 3x3. Show Answer Correct Answer: A) 2x3. 13. Una matriz invertible tiene determinante nulo A) Cierto. B) Falso. C) All the above. D) None of the above. Show Answer Correct Answer: B) Falso. 14. If area of a triangle with vertices (3, 2), (-1, 4) and (6, k) is 7 sq units, then possible values of k are ..... A) -3. B) 4. C) 3. D) -4. Show Answer Correct Answer: A) -3. 15. En la matriz identidad es donde los elementos de la diagonal principal son iguales a 1 A) Verdadero. B) Falso. C) All the above. D) None of the above. Show Answer Correct Answer: A) Verdadero. 16. What least number must be added to each of the numbers 6, 15, 20 and 43 to make them proportional? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 17. If matrices A and B are inverse of each other then A) AB = BA. B) AB = BA = I. C) AB = BA = 0. D) AB = 0, BA = I. Show Answer Correct Answer: B) AB = BA = I. 18. Matrix multiplication involves both multiplication and addition. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. For a square matrix A, A+A' is always a A) Symmetric matrix. B) Skew Symmetric matrix. C) May be symmetric or may be skew symmetric. D) Can't say . Show Answer Correct Answer: A) Symmetric matrix. 20. When solving a system AX=C using inverse matrices, you use the equation: A) X=A$^{-1}$C. B) C=X$^{-1}$A. C) A=X$^{-1}$C. D) X=C$^{-1}$A. Show Answer Correct Answer: A) X=A$^{-1}$C. 21. Solve by substitution. Tell the sum of x and y. $y=5x-5$ $5x+3y=5$ A) 0. B) 1. C) -5. D) 5. Show Answer Correct Answer: B) 1. 22. Solve for y:3x + 4y = 52 5x + y = 30 A) 10. B) 4. C) -10. D) -4. Show Answer Correct Answer: A) 10. 23. An n x n matrix consisting of 1's on its main diagonal and 0's elsewhere is called ..... Satu matriks n X n mengandungi 1 pada pepenjuru utama dan 0 bagi unsur yang lain-lain ialah ..... A) Identity matrixMatriks Identiti. B) Square matrixMatriks Segi empat sama. C) Inverse matrixMatriks songsang. D) Row matrixMatriks baris. Show Answer Correct Answer: A) Identity matrixMatriks Identiti. 24. A zero matrix has not all its elements as zero. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 25. Palabra reservada en matlab para crear funciones A) Function. B) Input. C) Size. D) End. Show Answer Correct Answer: A) Function. ← PreviousNext →Related QuizzesClass 12 Mathematics Chapter 3 Matrices Quiz 1Class 12 Mathematics Chapter 3 Matrices Quiz 2Class 12 Mathematics Chapter 3 Matrices Quiz 3Class 12 Mathematics Chapter 3 Matrices Quiz 4Class 12 Mathematics Chapter 3 Matrices Quiz 6Class 12 Mathematics Chapter 3 Matrices Quiz 7Class 12 Mathematics Chapter 3 Matrices Quiz 8Class 12 Mathematics Chapter 3 Matrices Quiz 9Class 12 Mathematics Chapter 3 Matrices Quiz 10Class 12 Mathematics Chapter 3 Matrices Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books