If x - 2 is a factor of x³ - kx - 12, then the value of k is :

1. 3

2. 2

3. -2

4. -3

In the given diagram, RT is a tangent touching the circle at S. If ∠PST = 30° and ∠SPQ = 60° then ∠PSQ is equal to :

1. 40°

2. 30°

3. 60°

4. 90°

If 3 is a root of the quadratic equation x² - px + 3 = 0 then p is equal to :

1. 4

2. 3

3. 5

4. 2