Class 8 Cubes And Cube Roots CBSE Questions & Answers

Class 8 · Cubes And Cube Roots

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

Questions & Answers

1
Find the cube root of 2197.
  • A
    43
  • B
    33
  • C
    23
  • D
    13
    Correct
2
Find the cube root of 13824.
  • A
    27
  • B
    25
  • C
    26
  • D
    24
    Correct
3
Find the cube root of 17576.
  • A
    24
  • B
    25
  • C
    23
  • D
    26
    Correct
4
Find the cube root of 15625.
  • A
    22
  • B
    25
    Correct
  • C
    24
  • D
    23
5
Find the cube root of 216000.
  • A
    50
  • B
    60
    Correct
  • C
    40
  • D
    None of these
6
Find the prime factorisation of 3375.
  • A
    \({{\text{3}}^{\text{3}}} \times {\text{ }}{{\text{5}}^{\text{3}}}\)
    Correct
  • B
    \({{\text{3}}^{\text{3}}} \times {\text{ }}{{\text{2}}^{\text{3}}}\)
  • C
    \({{\text{3}}^{\text{3}}} \times {\text{ }}{{\text{4}}^{\text{3}}}\)
  • D
    \({{\text{2}}^{\text{3}}} \times {\text{ }}{{\text{5}}^{\text{3}}}\)
7
Find the prime factorisation of 6859.
  • A
    \({\text{2}}{{\text{3}}^{\text{3}}}\)
  • B
    \({\text{3}}{{\text{4}}^{\text{7}}}\)
  • C
    \({{\text{6}}^{\text{8}}}\)
  • D
    \({\text{1}}{{\text{9}}^{\text{3}}}\)
    Correct
8
Find the prime factorisation of 1728.
  • A
    \({{\text{2}}^{\text{3}}} \times {\text{ }}{{\text{2}}^{\text{3}}} \times {\text{ }}{{\text{5}}^{\text{3}}}\)
  • B
    \({{\text{2}}^{\text{3}}} \times {\text{ }}{{\text{2}}^{\text{3}}} \times {\text{ }}{{\text{3}}^{\text{3}}}\)
    Correct
  • C
    \({{\text{2}}^{\text{3}}} \times {\text{ }}{{\text{3}}^{\text{3}}} \times {\text{ }}{{\text{3}}^{\text{3}}}\)
  • D
    None of these
9
What is the cube of double of ‘x’?
  • A
    \({\text{6}}{{\text{x}}^{\text{3}}}\)
  • B
    \({\text{8}}{{\text{x}}^{\text{3}}}\)
    Correct
  • C
    \({\text{4}}{{\text{x}}^{\text{3}}}\)
  • D
    None of these
10
What is the cube of double of ‘3a’?
  • A
    \({\text{6}}{{\text{a}}^{\text{3}}}\)
  • B
    \({\text{216}}{{\text{a}}^{\text{3}}}\)
    Correct
  • C
    \({\text{36}}{{\text{a}}^{\text{3}}}\)
  • D
    None of these
11
What is the cube of triple of ‘m’?
  • A
    \({\text{9}}{{\text{m}}^{\text{3}}}\)
  • B
    \({\text{27}}{{\text{m}}^{\text{3}}}\)
    Correct
  • C
    None of these
  • D
    \({\text{3}}{{\text{m}}^{\text{3}}}\)
12
Find the cubes of 2a, 3a and 4a.
  • A
    \({\text{8}}{{\text{a}}^{\text{2}}},{\text{ 27}}{{\text{a}}^{\text{2}}},{\text{ 64}}{{\text{a}}^{\text{2}}}\)
  • B
    \({\text{4}}{{\text{a}}^{\text{2}}},{\text{ 9}}{{\text{a}}^{\text{2}}},{\text{ 16}}{{\text{a}}^{\text{2}}}\)
  • C
    \({\text{4}}{{\text{a}}^{\text{3}}},{\text{ 9}}{{\text{a}}^{\text{3}}},{\text{ 16}}{{\text{a}}^{\text{3}}}\)
  • D
    \({\text{8}}{{\text{a}}^{\text{3}}},{\text{ 16}}{{\text{a}}^{\text{3}}},{\text{ 64}}{{\text{a}}^{\text{3}}}\)
    Correct
13
Find the cubes of x, 2x and 3x.
  • A
    \({{\text{x}}^{\text{3}}},{\text{ 8}}{{\text{x}}^{\text{3}}},{\text{ 27}}{{\text{x}}^{\text{3}}}\)
    Correct
  • B
    \({\text{8}}{{\text{x}}^{\text{2}}},{\text{ 27}}{{\text{x}}^{\text{2}}},{\text{ 64}}{{\text{x}}^{\text{2}}}\)
  • C
    \({\text{4}}{{\text{x}}^{\text{2}}},{\text{ 9}}{{\text{x}}^{\text{2}}},{\text{ 16}}{{\text{x}}^{\text{2}}}\)
  • D
    \({\text{4}}{{\text{x}}^{\text{3}}},{\text{ 9}}{{\text{x}}^{\text{3}}},{\text{ 16}}{{\text{x}}^{\text{3}}}\)
14
Find the cubes of 3x, 5x and 7x.
  • A
    \({\text{27}}{{\text{x}}^{\text{3}}},{\text{ 125}}{{\text{x}}^{\text{3}}},{\text{ 343}}{{\text{x}}^{\text{3}}}\)
    Correct
  • B
    \({\text{4}}{{\text{x}}^{\text{2}}},{\text{ 9}}{{\text{x}}^{\text{2}}},{\text{ 16}}{{\text{x}}^{\text{2}}}\)
  • C
    \({\text{4}}{{\text{x}}^{\text{3}}},{\text{ 9}}{{\text{x}}^{\text{3}}},{\text{ 16}}{{\text{x}}^{\text{3}}}\)
  • D
    \({\text{8}}{{\text{x}}^{\text{2}}},{\text{ 27}}{{\text{x}}^{\text{2}}},{\text{ 64}}{{\text{x}}^{\text{2}}}\)
15
Find the cubes of x, 4x and 5x.
  • A
    \({\text{8}}{{\text{x}}^{\text{2}}},{\text{ 27}}{{\text{x}}^{\text{2}}},{\text{ 64}}{{\text{x}}^{\text{2}}}\)
  • B
    \({\text{4}}{{\text{x}}^{\text{2}}},{\text{ 9}}{{\text{x}}^{\text{2}}},{\text{ 16}}{{\text{x}}^{\text{2}}}\)
  • C
    \({\text{4}}{{\text{x}}^{\text{3}}},{\text{ 9}}{{\text{x}}^{\text{3}}},{\text{ 16}}{{\text{x}}^{\text{3}}}\)
  • D
    \({{\text{x}}^{\text{3}}},{\text{ 64}}{{\text{x}}^{\text{3}}},{\text{ 125}}{{\text{x}}^{\text{3}}}\)
    Correct