1 
Sum of all four fourth roots of unity is: 

2 
The other name of quadratic equation is: 
 A. linear equation
 B. 1st degree equation
 C. 2nd degree equation
 D. none

3 
Four fourth roots of 625 are: 
 A. ±5,±5i
 B. ±5,±25i
 C. ±25,±25i
 D. none of these

4 
Complex roots of real quadratic equation always occur in: 
 A. conjugate pair
 B. ordered pair
 C. reciprocal pair
 D. none of these

5 
If α, ß are the roots of x<sup>2</sup> + kx + 12=0 such that αß = 1 then K = : 

6 
How many complex cube roots of unity are there: 

7 
If 4<sup>x</sup> = 2, then x equals: 

8 
If the sum of the roots of ax<sup>2</sup>  (a + 1) x + (2a + 1) = 0 is 2, then the product of the roots is: 

9 
If one root of 2x<sup>2</sup> + ax + 6 = 0 is 2 then the value of a is: 

10 
If α, ß are complex cube roots of unity, then 1 + α<sup>n</sup> + ß<sup>n</sup> = .......... where n is a positive integer divisible by 3: 
