Class 8 Algebraic Expressions And Identities CBSE Questions & Answers

Class 8 · Algebraic Expressions And Identities

This is Mathematics Class 8 Algebraic Expressions and Identities CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
501 \( \times \) 502 =?
  • A
    251502
    Correct
  • B
    250000
  • C
    150000
  • D
    251500
2
An identity is an ______, which is true for all values of the variables in the equality.
  • A
    None of these
  • B
    non-equal
  • C
    difference
  • D
    equality
    Correct
3
While multiplying a polynomial by a monomial, we multiply every term in the polynomial by the ________.
  • A
    monomial
    Correct
  • B
    None of these
  • C
    trinomial
  • D
    polynomial
4
n ( 4 + m) = ____ + nm
  • A
    4mn
  • B
    mn
  • C
    4m
  • D
    4n
    Correct
5
Using Identity find\({\left( {{\text{4}}.{\text{9}}} \right)^{\text{2}}}\).
  • A
    None of these
  • B
    76
  • C
    24.01
    Correct
  • D
    26.01
6
Simplify: (1.5x – 4y) (1.5x + 4y + 3) – 4.5x + 12y
  • A
    \({\text{2}}.{\text{25}}{{\text{x}}^{\text{2}}}-{\text{ 16y}}\)
  • B
    \({\text{2}}.{\text{25}}{{\text{x}}^{\text{2}}}-{\text{ 16}}{{\text{y}}^{\text{2}}}\)
    Correct
  • C
    \({{\text{x}}^{\text{2}}}-{\text{ 16}}{{\text{y}}^{\text{2}}}\)
  • D
    \({\text{2}}.{\text{25}}{{\text{x}}^{\text{2}}}-{\text{ 16}}\)
7
\({\left( {\frac{4}{3}m - \frac{3}{4}n} \right)^2} + 2mn = ?\)
  • A
    None of these
  • B
    \(\frac{{16}}{9}{m^2} + \frac{9}{{16}}{n^2}\)
    Correct
  • C
    \(\frac{{16}}{9}{m^2} + \frac{9}{{16}}n\)
  • D
    \(\frac{{16}}{9}m + \frac{9}{{16}}{n^2}\)
8
(x + a) (x + a) =?
  • A
    \({{\text{x}}^{\text{2}}} + {\text{ }}{{\text{a}}^{\text{2}}}\)
  • B
    \({\left( {{\text{x }} + {\text{ a}}} \right)^{\text{2}}}\)
    Correct
  • C
    \({\text{x }} + {\text{ }}{{\text{a}}^{\text{2}}}\)
  • D
    \({\text{x }}--{\text{ }}{{\text{a}}^{\text{2}}}\)
9
Which of the following is a monomial?
  • A
    4x + y
  • B
    2x + 7
  • C
    3a
    Correct
  • D
    3x + 5y + 7
10
Which of the following is like term as 6xyz?
  • A
    7x
  • B
    7xyz
    Correct
  • C
    7xz
  • D
    7xy
11
95 \( \times \) 103 =?
  • A
    9000
  • B
    9785
    Correct
  • C
    9700
  • D
    9600
12
Coefficients of like terms need not be the ______.
  • A
    None of these
  • B
    same
    Correct
  • C
    different
  • D
    equal
13
A monomial multiplied by a monomial always gives a __________.
  • A
    trinomial
  • B
    None of these
  • C
    monomial
    Correct
  • D
    binomial
14
a ( 5 – b) = 5a – ____
  • A
    5ab
  • B
    5a
  • C
    5b
  • D
    ab
    Correct
15
Using Identity find 78 \( \times \) 82.
  • A
    6300
  • B
    6000
  • C
    6396
    Correct
  • D
    None of these