KPK 9th Mathematics — MCQs, Short & Long Questions

Model answers for short question aren’t in the question bank yet. Practise writing your own; answers will appear here as they’re added.

i) If A = [\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}], give the elements: a_{12}

Which of the following matrices are equal: A = [\begin{matrix} 2 & 5 \\ 1 & 3 \end{matrix}], B = [\begin{matrix} 2 & 5 \\ 4 & 3 \end{matrix}], C = [\begin{matrix} 1 + 1 & 3 + 2 \\ 4 & 2 + 1 \end{matrix}], D = [\begin{matrix} 2 & 4 + 1 \\ 1 & 3 \end{matrix}]

Let A = [\begin{matrix} 2 & - 3 \\ u & 0 \end{matrix}] and B = [\begin{matrix} v & - 3 \\ 5 & w \end{matrix}], for what values of u, v and w are A and B

equal.

If [\begin{matrix} x + 3 & z + 4 & 2 y - 7 \\ - 6 & a - 1 & 0 \\ b - 3 & - 21 & 0 \end{matrix}] = [\begin{matrix} 0 & 6 & 3 y - 2 \\ - 6 & - 3 & 2 c + 2 \\ 2 b + 4 & - 21 & 0 \end{matrix}], find the values of a, b, c,

x, y and z.

Solve the equation for a, b, c, d: [\begin{matrix} a + b & b + 2 c \\ 2 c + d & 2 a - d \end{matrix}] = [\begin{matrix} - 1 & 4 \\ 8 & 0 \end{matrix}]

If A = [\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}], give the element: a_{23}

If A = [\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}], give the element: a_{32}

If A = [\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}], give the element: a_{43}

If A = [\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}], give the element: a_{13}

If A = [\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}], give the element: a_{33}

Which of the square and which are rectangular matrice? A = [\begin{matrix} 2 & 3 \\ 0 & 5 \end{matrix}]

Which of the square and which are rectangular matrice? B = [\begin{matrix} 6 & 3 & - 1 \\ 1 & 5 & 2 \end{matrix}]

Which of the square and which are rectangular matrice? C = [\begin{matrix} 1 & 0 & 0 \\ 0 & 2 & 0 \\ 0 & 0 & 1 \end{matrix}]

Which of the square and which are rectangular matrice? B = [- 5]

Which of the square and which are rectangular matrice? E = [\begin{matrix} - 3 & 4 \end{matrix}]

Which of the square and which are rectangular matrice? E = [\begin{matrix} - 1 \\ 7 \end{matrix}]

Write the order of the matrices: E = [\begin{matrix} 3 & 2 \end{matrix}]

Write the number of rows and column of the following matrices and hence mention their orders. i.

i. A = [\begin{matrix} p & q \\ r & s \end{matrix}]

Write the number of row and column of the matrice and hence mention their order. B = \begin{bmatrix} 3 & 4 & 7 \\ 5 & 6 & 8 \end{bmatrix}

If A =

[\begin{matrix} 3 & 2 & - 4 \\ - 2 & 5 & 0 \\ 2 & 1 & 5 \\ - 3 & 4 & 6 \end{matrix}]

, give the elements: a₁₂

Mathematics