The next two terms of the A.P., $\sqrt{3}, \sqrt{12}, \sqrt{27}, ……$ are :

1. 9 and $9\sqrt{3}$

2. $6\sqrt{3} \text{ and } 7\sqrt{3}$

3. $\sqrt{48}\text{ and } \sqrt{75}$

4. $\sqrt{75}\text{ and } \sqrt{108}$

If x ∈ W (whole numbers) and -4x > -2 - 3x, the solution set on the number line is :

The point P(m, n) is first reflected in x-axis to point P' and then point P' is reflected in y-axis to point P". Then the single transformation that reflects point P to P" is :

1. reflection in x-axis

2. reflection in y-axis

3. reflection in origin

4. invariant

A solid sphere and a solid hemisphere have the same total surface area. The ratio of their diameters is :

1. $\sqrt{2} : 3$

2. 3 : 2

3. $\sqrt{3} : 2$

4. 3 : $\sqrt{2}$