Class 7 Algebraic Expressions CBSE Questions & Answers

Class 7 · Algebraic Expressions

This is Mathematics Class 7 Algebraic Expressions CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
From the following expressions \({\text{3ab}},{\text{ }}{{\text{a}}^{\text{2}}},{\text{ }}{{\text{b}}^{\text{2}}},{\text{ a}},{\text{ 5ab}},{\text{ }}--{\text{2ab}},{\text{ 2}}{{\text{a}}^{\text{2}}}\) the unike terms are
  • A
    \({{\text{b}}^{\text{2}}}\), a
    Correct
  • B
    3ab, 5ab, -2ab
  • C
    \({{\text{a}}^{\text{2}}},{\text{ 2}}{{\text{a}}^{\text{2}}}\)
  • D
    None of these
2
Sum of 3m and 2n is
  • A
    None of these
  • B
    3m + 2n
    Correct
  • C
    2n – 3m
  • D
    3m – 2n
3
Sum of xy, x + y and y + xy is
  • A
    2xy + 2x + 2y
  • B
    None of these
  • C
    2xy + x + 2y
    Correct
  • D
    2xy + 2y
4
The value of 21b – 32 + 7b – 20b is
  • A
    None of these
  • B
    8b
  • C
    8b – 32
    Correct
  • D
    -32
5
Subtract a – b from a + b, the result is
  • A
    b
  • B
    0
  • C
    2a
  • D
    2b
    Correct
6
Subtracting \(-{\text{5}}{{\text{y}}^{\text{2}}}\)from \({{\text{y}}^{\text{2}}}\),the result is
  • A
    \({{\text{y}}^{\text{2}}}\)
  • B
    \({\text{6}}{{\text{y}}^{\text{2}}}\)
    Correct
  • C
    \({\text{5}}{{\text{y}}^{\text{2}}}\)
  • D
    \( - {\text{6}}{{\text{y}}^{\text{2}}}\)
7
The value of expression 5n – 2, when n= –2 is
  • A
    12
  • B
    -12
    Correct
  • C
    10
  • D
    None of these
8
The value of expression 7a – 4b for a = 3, b = 2 is
  • A
    None of these
  • B
    10
  • C
    13
    Correct
  • D
    7
9
When x = 0, y = –1, then the value of expression 2x + 2y is
  • A
    1
  • B
    0
  • C
    -2
    Correct
  • D
    2
10
Factors of the term \({\text{15}}{{\text{x}}^{\text{2}}}\) in the expression \({\text{15}}{{\text{x}}^{\text{2}}}\) –13x are
  • A
    15, -13
  • B
    15, x, x
    Correct
  • C
    15x, -13
  • D
    3, x
11
Multiply 3x and 4x.
  • A
    \({\text{8}}{{\text{x}}^{\text{2}}}\)
  • B
    None of these
  • C
    \({\text{6}}{{\text{x}}^{\text{2}}}\)
  • D
    \({\text{12}}{{\text{x}}^{\text{2}}}\)
    Correct
12
Get the algebraic expressions using variables, constants and arithmetic operations. Subtraction of p from q
  • A
    p/q
  • B
    q – p
    Correct
  • C
    p – q
  • D
    pq
13
Find the value of 100 - 10 \({{\text{x}}^{\text{3}}}\) for x = 2.
  • A
    None of these
  • B
    10
  • C
    30
  • D
    20
    Correct
14
Find the product of \(\left( {3x - 5y} \right)\left( {3x - 5y} \right)\).
  • A
    \({\text{16}}{{\text{x}}^{\text{2}}} + {\text{ 25}}{{\text{y}}^{\text{2}}}-{\text{ 3}}0{\text{xy}}\)
  • B
    \({\text{9}}{{\text{x}}^{\text{2}}} + {\text{ 25}}{{\text{y}}^{\text{2}}}-{\text{ 3}}0{\text{xy}}\)
    Correct
  • C
    \({\text{9}}{{\text{x}}^{\text{2}}} + {\text{ 25}}{{\text{y}}^{\text{2}}}-{\text{ 25xy}}\)
  • D
    \({\text{9}}{{\text{x}}^{\text{2}}} + {\text{ 36}}{{\text{y}}^{\text{2}}}-{\text{ 3}}0{\text{xy}}\)
15
When terms have different algebraic factor, they are called ________.
  • A
    expressions
  • B
    None of these
  • C
    like terms
  • D
    unlike terms
    Correct