Algebraic Expressions MCQ Questions Class 7 Maths Chapter 12
NCERT MCQ Questions for Class 7 Maths Chapter 12 Algebraic Expressions. Algebraic Expressions MCQ Questions with Answers from Class 7 Maths
Algebraic Expressions MCQ Questions Class 7 Maths Chapter 12
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Chapter – 12
Algebraic Expressions
Question 1:
What are co-efficient of y in 3y + 8 =?
(a) 4
(b) 3
(c) 6
(d) 8
Ans:
(b) 3, term with factor y = 3y and the coefficients 3.
Question 2:
Which example contain coefficient of x is 6?
(a) 3x – 5
(b) 5x – 6
(c) 6x – 5
(d) 7x + 5
Ans:
(c) 6x – 5.
Term contain x = 6x coefficient is 6.
Question 3:
Write expressions sum of numbers of x and y subtracted from their product?
(a) (x × y) – (x + y)
(b) (x + y) – x/y
(c) x/y – xy
(d) x + y – x
Ans:
(d) (x + y) – (x + y) is correctly written expression by the above statement.
Question 4:
Simplify combining like terms 420 + 21a – 6a + 28
(a) 28
(b) 57a + 28
(c) 57 + 0
(d) a + 28
Ans:
42a + 21a – 6a + 28
= a (42 + 21a – 6) + 28
= 57a + 28
= 57a + 28 (b)
Question 5:
Simplify combining like terms.
13x + 14y + 15y + 6x + 21
(a) 2x + 29y + 21
(b) 5x + 3x + 21
(c) 2x + 3
(d) 5x – 21
Ans:
(a) = 13x + 14y – 17x + 15y + 6x + 21
= (13 + 6 – 17) x + y (14 + 15) + 21
= 2x + 29y + 21 (a)
Question 6:
Add 3yx + 4y2 + 3x – 6, 6yx + 2y2 + x – 9
(a) 6y2 + 9yx + 4x – 13
(b) 6yx + 13y2 – 9
(c) 3y2 + 6yx + 4x – 11
(d) 6y2 + 8xy – 13
Ans:
Question 7:
Add 4p2q2 – 4pq + 8, -10p2q2, 14 + 9pq + 7p2q
(a) p2q2 + 15
(b) 3p2q2 + 5pq + 12
(c) p2q2 + 5pq + 22
(d) p2q2 + 4pq + 11
Ans:
- In case you have missed:- Previous Chapter MCQ Questions
Question 8:
Find the value of following expression.
2x2 – 2x + 1 for x = 3
(a) 16
(b 13
(c) 19
(d) 21
Ans:
(b) 13
2x2 – 2x + 1 for x = 3
2 × (3)2 – 2 × 3 + 1
= 2 × 9 – 6 + 1
= 13
Question 9:
Find the value of expression 15n2 + 5n – 3 for n = 2
(a) 63
(b) 62
(c) 67
(d) 69
Ans:
15n2 + 5n – 3 for n = 2
15 × 22 + 5 × 2 – 3 = 67 (c)
Question 10:
Find the value of expression when P = 3, q = 2 p2 + q2 + pq
(a) 17
(b) 19
(c) 21
(d) 24
Ans
(b) 19,
P2 + q2 + pq for P = 3, q = 2
32 + 22 + 3×2
= 9 + 4 + 6
= 19 (b)
Question 11:
Find the value if a = 2 and b = 3 in 3a2 + 4b2 – 4
(a) 44
(b) 48
(c) 42
(d) 46
Ans:
3a2 + 4b2 – 4 for a = 2 and b = 3
3 (2)2 + 4 (3)2 – 4
= 3×4×4×9-4
= 44 (a)
Question 12:
Substract 6y2 + 2y from 9y2 + 8y + 2
(a)
(b)
(c)
(d)
Ans:
Question 13:
Simplify (3x2 + 6y – 8) – (8y + x2 – 6)
(a) 3y2 + 2y + 1
(b) 2x2 – 2y – 2
(c) 2x2 – 1
(d) 4x2 – 2y + 1
Ans:
3x2 + 6y – 8 – (8y + x2 – 6) by solving we get (b)
= 3x2 + 6y – 8 – 8y – x2 + 6
= 3x2 – x2 + 6y – 8y – 8 + 6
= 2x2 – 2y – 2 (b)
Question 14:
Find the pattern.
(a) 2n + 2
(b) 3n + 2
(c) 6n + 2
(d) 5n + 2
Ans:
(3n + 2) (3n + 2) Hence the pattern is 3n + 2 (b)
n = 1, n = 2
Question 15:
Find the pattern.
(a)
(b)
(c)
(d)
Ans:
5n + 2, 5n + 2
n = 1, n = 2
Hence the pattern 5n + 2
this Pattern follows upto 100 and 5n + 2 so on—-
- In case you have missed:- Next Chapter MCQ Questions
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