What is the number of all $n\times n$ matrices with entries in $ \{0,1\}$ that in every row and every column has at least one 1?
31326
Number of $(0,1)$ $m\times n$ matrices with no empty rows or columns
22410
Find a symmetric matrix $B$ such that for every $3\times 1$ matrix $\text{x}$
75104
Existence of some type matrix
135421
Determinant of an $n\times n$ Toeplitz matrix
21758
Rank of the $n \times n$ matrix with ones on the main diagonal and $a$ off the main diagonal
45111
Number of Subspaces that contains other Space
11397
How do I write this matrix as a product of elementary row matrices.
34372
Are $10\times 10$ matrices spanned by powers of a single matrix?
12955
Classification of $n\times n$ real matrices up to congruence
36064
How many $3 \times 3$ integer matrices are orthogonal?
138104
Algebra-sum of entries in each column of a sqaure matrix = constant
151526
Determinant of a matrix with different cases for its entries
95227
Is the set of all $n\times n$ matrices, such that for a fixed matrix B  AB=BA, a subspace of the vector space of all $n\times n$ matrices?
121800
Find the determinant of $N \times N$ matrix
70092
Determine the number of possible values for $\det(A)$, given that $A$ is an $n \times n$ matrix with real entries such that $A^3 - A^2 -3A +2I=0$.
13442
Find three real orthogonal matrices of order $3$ having all integer entries.
1799
How many k-dimensional subspaces there are in n-dimensional vector space over $\mathbb F_p$?