Matrices — Practice Quiz
Telangana Open School (TOSS) · Class 12 · Mathematics
Try a 4-question quiz on Matrices for Telangana Open School (TOSS) Class 12 Mathematics: tap an answer to check it and see why.
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What is the order of the matrix \( \begin{bmatrix} 1 & 2 \ 3 & 4 \ 5 & 6 \ 7 & 8 \end{bmatrix} \)?
Which of the following is a row matrix?
If \( A = \begin{bmatrix} 2 & 3 \\ 4 & 5 \end{bmatrix} \), what is the element \( a_{21} \)?
Which of the following is a zero matrix?
Sample Questions
What is the order of a column matrix with 5 elements?
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5 × 1
A column matrix has only one column. With 5 elements, it must have 5 rows. So, the order is 5 × 1.
If two matrices are equal, then:
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They must have the same order.,Their corresponding elements must be equal.
For two matrices to be equal, they must have the same order and their corresponding elements must be equal.
The matrix \( \begin{bmatrix} 1 & 0 \\ 0 & 1 \end{bmatrix} \) is a diagonal matrix.
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True
A diagonal matrix has non-zero elements only on the principal diagonal. The given matrix has 1s on the diagonal and 0s elsewhere, so it is a diagonal matrix.
What is the order of the matrix \( \begin{bmatrix} 1 & 2 & 3 \\ 4 & 5 & 6 \end{bmatrix} \)?
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2 × 3
The matrix has 2 rows and 3 columns. So, its order is 2 × 3.
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