Page 32 - Mathematics Class - IX

MCQs

1. The value of 1 – p is
3
a) (p – 1) (1 + p + p ) b) (1 – p) (1 + p + p )
2
2
c) (1 – p)(1 –p + p ) d) (p + 1) (1 + p + p )
2

2
2. Degree of a – b is
3
3
a) 3 b) 2 c) 0 d) 6
3. The coefficient of b in (125b – 8x ) is
3
3
3
a) –8 b) 125 c) 8 d) –125
4. 27m – 8n is a
3
3
a) monomial b) trinomial c) binomial d) none of these
5. If the area of a rectangle is (216x – y ), the dimensions of rectangle could be
3
3
a) (6x – y) (6x + y) b) (6x – y) (36x + y + 6xy)
2
2
c) (6x – y) (36x – 6xy + y ) d) none of these
2
2
Answers: 1. b) (1 – p) (1 + p + p ) 2. a) 3 3. b) 125
2
4. c) binomial 5. b) (6x – y) (36x + y + 6xy)
2
2

Case-Study Based Questions
Case-Study Based Questions
The owners of orphanages often need extra support. So, for the

1 

3
welfare of these children, Mrs Kapoor donated ` a + a  to the

3 

orphanage. Her friend Renu wanted to know the amount donated
by her. Mrs Kapoor did not disclose the amount but she gave a clue
1
that a + = ` 6.
a

Now answer the following questions.
1. The amount donated by Mrs Kapoor.
(a) ` 200 (b) ` 198 (c) ` 188 (d) ` 190

2. Write the formula of (a + b) .
3
(a) a + b + 3ab (a + b) (b) a + b – 3ab (a + b)
3
3
3
3
(c) a – b – 3ab (a + b) (d) a – b + 3ab (a + b)
3
3
3
3
1
3. If a + = ` 10, then the amount denoted by Mrs Kapoor.
a
(a) ` 970 (b) ` 960 (c) ` 900 (d) ` 1020
30