1 
Division of a natural number by another natural number gives: 
 A. always a natural number
 B. always an integer
 C. always a rationalnumber
 D. always an irrational number

2 

 A. real numbers
 B. complexnumbers
 C. primenumbers
 D. oddnumbers

3 
The multiplicative invers of a nonzero real number a is: 

4 


5 
Irrational numbers are: 
 A. terminating decimals
 B. nonterminating decimals
 C. nonterminating, repeating decimals
 D. nonterminating, non repeating

6 
Conjugate of a + i b is: 
 A. a + ib
 B. a + ib
 C. a  ib
 D. a  ib

7 
π is defined as: 
 A. ration of diameter of a circle to its circumference
 B. ration of the circumference of a circle to its diameter
 C. ration of area of a circle to its circumference
 D. ration of the circumference of a circle to its area

8 
Product of a complex number and its conjugate is: 
 A. a real number
 B. irrationalnumber
 C. a complexnumber
 D. either real number or complexnumber

9 


10 
The real part of the complex number a + bi is: 
