If A=, then A100 is equal to.
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If the order of a matrix is 20×5, then the number of elements in the matrix is _____
If A=(1 5 6 −1−40379248), In which row and column does the element 7 occur?
Classify the following matrices: (i) [25−11] (ii) [23−7] (iii) ⎣⎡30−1⎦⎤ (iv) ⎣⎡201−407⎦⎤ (v) [2−17280] (vi) 
If A=[cosα sinα −sinαcosα ] is identity matrix, then write the value of α.
Construct a 3×2 matrix A=[aij] whose elements are given by aij=2(i−2j)2
Find Order of matrix : 
Find the number of all possible matrices of order 3×3 with each entry 0 and 1.
In the matrix A=⎣⎡a2013 5xx2−y5−2 ⎦⎤, writeelements a23,a31 and a12