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**Mark the correct alternatice in each of the following:**

**1. 5 more than twice a number x is written as**

**(a) 5 + x + 2**

**(b) 2x + 5**

**(c) 2x - 5**

**(d) 5x + 2**

**Answer: **(b) 2x + 5

**2. The quotient of x by 2 is written as**

**(a)**

**(b) **

**(c) **

**(d) **

**Answer:** (a)

**3. The quotient of x by 3 is multiplied by y is written as**

**(a) **

**(b) **

**(c) **

**(d) **

**Answer**: (d)

**4. 9 taken away from the sum of x and y is**

**(a) x + y - 9**

**(b) 9 - (x + y)**

**(c) **

**(d) **

**Answer:** (a) x + y - 9

**5. The quotient of x by y added to the product of x and y is written as**

**(a) **

**(b) +xy**

**(c)**

**(d) **

**Answer:** (a) +xy

**6. a ^{2}b^{3}Ã—2ab^{2} is equal to**

**(a) 2a ^{3}b^{4}**

**(b) 2a ^{3}b^{5}**

**(c) 2ab**

**(d) a ^{3}b^{5}**

**Answer: **(b) 2a^{3}b^{5}

**7. 4a2b ^{3}Ã—3ab^{2}Ã—5a^{3}b is equal to**

**(a) 60a ^{3}b^{5}**

**(b) 60a ^{6}b^{5}**

**(c) 60a ^{6}b^{6}**

**(d) a ^{6}b^{6}**

**Answer:** (c) 60a^{6}b^{6}

**8. if 2x ^{2}y and 3xy^{2} denote the length and breadth of a rectangle, then its area is**

**(a) 6xy**

**(b) 6x ^{2}y^{2}**

**(c) 6x ^{3}y^{3}**

**(d) x ^{3}y^{3}**

**Answer:** (c) 6x^{3}y^{3}

**9. In a room there are x ^{2} rows of chairs and each rows contains 2x^{2 }chairs. The total number of chairs in the room is**

**(a) 2x ^{2}**

**(b) 2x ^{4}**

**(c) x ^{4}**

**(d) x ^{44}**

**Answer:** (b) 2x^{4}

**10. a ^{3}Ã—2a^{2}bÃ—3ab^{5} is equal to**

**(a) a ^{6}b^{6}**

**(b) 23a ^{6}b^{6}**

**(c) 6a ^{6}b^{6}**

**(d) None of these**

**Answer:** (b) 2x^{4}

### Basic Geometrical Concepts - RD Sharma 2019

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