10th Class Mathematics Chapter 1 TestUNIT 1: COMPLEX NUMBERS

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. The additive inverse of  is:

   1. 

   2. 

   3. 

   4. (-2+7i)

2. Conjugant of  is:

   1. 

   2. 

   3. 

   4. 

3. If y=0 the complex number is said to be:

   1. Real

   2. Imaginary

   3. Even

   4. Prime

4. If  then =

   1. 13-7i

   2. 169

   3. 812

   4. 218

5. =......:

   1. 

   2. 

   3. 

   4. 

6. The Conjugate of -11i is:

   1. 11i

   2. -11

   3. -11i

   4. 

7. Which is the associative property of complex numbers?

   1. 

   2. 

   3. 

   4. 

8. If  then 3z=......:

   1. 

   2. 

   3. 

   4. 

9. =......

   1. 

   2. 

   3. 

   4. 

10. If  then x=......:

    1. 

    2. 

    3. 

    4.