Ch – 9 Algebraic Expressions

Q.1: What is the coefficient of x in y – 8 + x ?

a) 8

b) 1

c) (-8)

Q.2: The sum of pq + 3p and 4q – 3pq is ________________.

a) 3p + 4q – 2pq

b) 3p + 4pq – 4q

c) 7pq – 2pq

Q.3: The constant term in the expression 1 + x + xy is ________.

a) x

b) xy

c) 1

Q.4: The number of terms in the expression 0.5r + 0.6pr – 2.5qr is ________________.

a) 3

b) 2

c) 4

Q.5: The expression 47z + 38y is ____________.

a) monomial

b) binomial

c) trinomial

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Q.6: By subtracting 2t + 15pq from 18pq – 5t, we will get _______________.

a) 3pq – 3t

b) 3pq – 7t

c) 3pq + 7t

Q.7: If x = 0 and y = (-1), then the value of 5x + 2y will be ________.

a) 0

b) (-1)

c) (-2)

Q.8: The value of expression 2( x – 4 ) + 10 at x =2 is ___________.

a) 6

b) (-6)

c) (-3)

Q.9: What should be the value of y if y² + y – b = 3 for y = 1 ?

a) 0

b) 1

c) (-1)

Q.10: The common factor in the terms 35xy and (-14)r is ___________.

a) 7

b) 10

c) 7xyr

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Q.11: Area of the rectangle with length as 3q and breadth as 4p is _______.

a) 12pq

b) 7pq

c) 14pq

Q.12: Value of (9x + 6) and (4y + 3) is _________________.

a) 36xy + 27x + 24y + 18

b) 18xy + 42xy + 20

c) 12xy + 14x + 21y + 2

Q.13: The suitable identity to find the value of (4 + p) (4 + p) is ______________.

a) (a – b)²

b) (a + b)²

c) Either ‘a’ or ‘b’

Q.14: Using identity (x + a) (x + b) = x² + (a + b)x + ab, find the answer of (n + 5) (n + 6).

a) n² + 30n + 30

b) n² + 12n + 20

c) n² + 11n + 30

Q.15: (a – b)² = ______________.

a) a² – 2ab – b²

b) a² + 2ab – b²

c) a² – 2ab + b²

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Q.16: Find the value of 95 and 105 by using suitable identity.

a) 9925

b) 9975

c) 9950

Q.17: The product of 2x and (5xy + 3y) is _______________.

a) 16x² y

b) 10x² y + 6xy

c) 6xy + 15x²

Q.18: Using suitable identity, find the value of (7.3)²

a) 53.29

b) 53.29

c) 5.329

Q.19: Using the identity (x + a) (x + b) = x² + (a + b)x + ab, find the value of 101 x 102.

a) 10002

b) 10302

c) 10332

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Q.20: The length, breadth and height of a cuboid is 2a³ , 5ab and 3x respectively. Find its volume.

a) 30a⁴ bx

b) 30a³ bx

c) 15abx

Answers:

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1. b
2. a
3. c
4. a
5. b
6. b
7. c
8. a
9. c
10. a
11. a
12. a
13. b
14. c
15. c
16. b
17. b
18. a
19. b
20. a

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