If matrix 𝐴 = $\begin{bmatrix$}[r] 2 & 2 \ 0 & 2 \end{bmatrix}\text{ and } A^2 = \begin{bmatrix}[r] 4 & x \ 0 & 4 \end{bmatrix}, then the value of x is :

1. 2

2. 4

3. 8

4. 10

The median of the following observations arranged in ascending order is 64. Find the value of x :

27, 31, 46, 52, x, x + 4, 71, 79, 85, 90

1. 60

2. 61

3. 62

4. 66

The given table shows the distance covered and the time taken by a train moving at a uniform speed along a straight track.

The values of x and y are :

1. x = 4, y = 150

2. x = 3, y = 100

3. x = 4, y = 100

4. x = 3, y = 150

The 7th term of the given Arithmetic Progression (A.P.):

$\dfrac{1}{a}, \Big(\dfrac{1}{a} + 1\Big), \Big(\dfrac{1}{a} + 2\Big), ……$ is :

1. $\Big(\dfrac{1}{a} + 6\Big)$

2. $\Big(\dfrac{1}{a} + 7\Big)$

3. $\Big(\dfrac{1}{a} + 8\Big)$

4. $\Big(\dfrac{1}{a} + 7^7\Big)$