1 
H.C.F of 39x<sup>7</sup>y<sup>3</sup>z and 91x<sup>5</sup>y<sup>6</sup>z<sup>7</sup> is: 
 A. 13x<sup>7</sup>y<sup>6</sup>z<sup>2</sup>
 B. 13x<sup>5</sup>y<sup>3</sup>z
 C. 91x<sup>5</sup>y<sup>6</sup>z<sup>2</sup>
 D. 91x<sup>5</sup>y<sup>3</sup>z

2 
H.C.F of x<sup>2</sup>4 and 2x<sup>2</sup>+x6: 
 A. (x2)
 B. (x+2)
 C. (2x3)
 D. (x+2)(2x3)

3 
HCF of x<sup>2</sup>5x+6 and x<sup>2</sup>x6 is: 
 A. x3
 B. x+2
 C. x<sup>2</sup>4
 D. x2

4 
HCF of x2 and x+x6 is: 
 A. x<sup>2</sup>+x6
 B. x+3
 C. x2
 D. x+2

5 
If two are more algebraic expression are given then their common factors of highest power is called of the expressions: 
 A. LCM
 B. HCF
 C. Multiplication
 D. Square root

6 
HCF of p<sup>3</sup>qpq<sup>3</sup> and p<sup>5</sup>q<sup>2</sup>p<sup>2</sup>q<sup>5</sup> is: 
 A. pq(p<sup>2</sup>q<sup>2</sup>)
 B. pq(pq)
 C. p<sup>2</sup>q<sup>2</sup>(pq)
 D. pq(p<sup>3</sup>q<sup>3</sup>)

7 
The product of two algebraic expressions is equal to the _________ of their HCF and LCM: 
 A. Sum
 B. Difference
 C. Product
 D. Quotient

8 
LCM of a<sup>2</sup>+b<sup>2</sup> and a<sup>4</sup>b<sup>4</sup> is: 
 A. a<sup>2</sup>+b<sup>2</sup>
 B. a<sup>2</sup>b<sup>2</sup>
 C. a<sup>4</sup>b<sup>4</sup>
 D. ab

9 
Simplify this: 

10 
Simplify it: 
