JEE & NEETJEE Mathematics JEE Main Maths 100+ MCQ & Answer | Page-04 | JEE & NEET MCQ February 4, 2025 DSN MARATHI 31. If the order of the matrix is m×n, then how many elements will there be in the matrix? A. mn B. 2mn C. mn2 D. m2 n2 Answer Option : A 32. Which of the following is not a type of matrix? A. Scalar matrix B. Minor matrix C. Diagonal matrix D. Symmetric matrix Answer Option : B 33. Which of the following condition is incorrect for matrix multiplication? A. AB=BA B. A(BC)=(AB)C C. A(B+C)=AB+AC D. AB=0 if either A or B is 0 Answer Option : A 34. The addition of matrices is only possible if they are of the same order. A. True B. False Answer Option : A 35. Which of the following conditions holds true for a symmetric matrix? A. A=-A’ B. A=A’ C. A=|A D. A=|A| Answer Option : B 36. The number of values of k for which the system of equations (k + 1) x + 8y = 4k, kx + (k + 3) y = 3k − 1 has infinitely many solutions, is _______. A. 1 B. 2 C. 3 D. 4 Answer Option : A 37. The function f : A → B defined by f(x) = 4x + 7, x ∈ R is A. one-one B. Many-one C. Odd D. Even Answer Option : A 38. The smallest integer function f(x) = [x] is A. One-one B. Many-one C. Both (a) & (b) D. None of these Answer Option : B 39. The function f : R → R defined by f(x) = 3 – 4x is A. Onto B. Not onto C. None one-one D. None of these Answer Option : A 40. The number of binary operations that can be defined on a set of 2 elements is A. 8 B. 4 C. 16 D. 64 Answer Option : C
31. If the order of the matrix is m×n, then how many elements will there be in the matrix? A. mn B. 2mn C. mn2 D. m2 n2 Answer Option : A
32. Which of the following is not a type of matrix? A. Scalar matrix B. Minor matrix C. Diagonal matrix D. Symmetric matrix Answer Option : B
33. Which of the following condition is incorrect for matrix multiplication? A. AB=BA B. A(BC)=(AB)C C. A(B+C)=AB+AC D. AB=0 if either A or B is 0 Answer Option : A
34. The addition of matrices is only possible if they are of the same order. A. True B. False Answer Option : A
35. Which of the following conditions holds true for a symmetric matrix? A. A=-A’ B. A=A’ C. A=|A D. A=|A| Answer Option : B
36. The number of values of k for which the system of equations (k + 1) x + 8y = 4k, kx + (k + 3) y = 3k − 1 has infinitely many solutions, is _______. A. 1 B. 2 C. 3 D. 4 Answer Option : A
37. The function f : A → B defined by f(x) = 4x + 7, x ∈ R is A. one-one B. Many-one C. Odd D. Even Answer Option : A
38. The smallest integer function f(x) = [x] is A. One-one B. Many-one C. Both (a) & (b) D. None of these Answer Option : B
39. The function f : R → R defined by f(x) = 3 – 4x is A. Onto B. Not onto C. None one-one D. None of these Answer Option : A
40. The number of binary operations that can be defined on a set of 2 elements is A. 8 B. 4 C. 16 D. 64 Answer Option : C
