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
    13
  • B
    14
  • C
    15
  • D
    -13
    Correct
2
Find the cube root of -3375.
  • A
    13
  • B
    -15
    Correct
  • C
    15
  • D
    2
3
Find the cube root of -9261.
  • A
    42
  • B
    21
  • C
    none of these
  • D
    -21
    Correct
4
Find the cube root of -12167.
  • A
    -23
    Correct
  • B
    none of these
  • C
    27
  • D
    23
5
Find the cube root of -132651.
  • A
    -51
    Correct
  • B
    51
  • C
    41
  • D
    15
6
If a is ones digit and b is tens digit of a two digit number, then the cube of the number will be _________.
  • A
    \({({\text{1}}0{\text{b }} + {\text{ a}})^{\text{3}}}\)
    Correct
  • B
    none of these
  • C
    \({({\text{1}}0{\text{b }} + {\text{ a}})^{\text{2}}}\)
  • D
    \({({\text{1}}0{\text{a }} + {\text{ b}})^{\text{3}}}\)
7
If m, is ones digit and n is tens digit of a two digit number, then the cube of the number will be _________.
  • A
    \({({\text{1}}0{\text{n }} + {\text{ m}})^{\text{2}}}\)
  • B
    \({({\text{1}}0{\text{m }} + {\text{ n}})^{\text{3}}}\)
  • C
    none of these
  • D
    \({({\text{1}}0{\text{n }} + {\text{ m}})^{\text{3}}}\)
    Correct
8
28 is a cube root of _________.
  • A
    15625
  • B
    none of these
  • C
    9261
  • D
    21952
    Correct
9
-25 is a cube root of _________.
  • A
    50
  • B
    none of these
  • C
    -15625
    Correct
  • D
    15625
10
27 is a cube root of _________.
  • A
    None of these
  • B
    41234
  • C
    729
  • D
    50653
    Correct
11
If\(\,\,{x^3} = \frac{{9261}}{{42875}}\,\,{\text{and}}\,\,{y^3} = \frac{{729}}{{2197}}\,\), then find x + y.
  • A
    none of these
  • B
    84
  • C
    65
  • D
    \(\frac{{84}}{{65}}\)
    Correct
12
1681 plants are to be planted in a garden in such a way that each row contains as many plants as the number of rows. Find the number of rows.
  • A
    41
    Correct
  • B
    43
  • C
    47
  • D
    49
13
\({\text{2}}{{\text{9}}^{\text{2}}}\)would have digit _____ at unit place.
  • A
    3
  • B
    1
    Correct
  • C
    2
  • D
    4
14
\({\text{3}}{{\text{6}}^{\text{2}}}\) would have digit _____ at unit place.
  • A
    2
  • B
    0
  • C
    4
  • D
    6
    Correct
15
\({\text{2}}0{{\text{7}}^{\text{2}}}\) would have digit _____ at unit place.
  • A
    6
  • B
    9
    Correct
  • C
    3
  • D
    0