Cubes And Cube Roots NCERT Solutions - Class 8 Mathematics | Kedovo | Kedovo
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Cubes And Cube Roots
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NCERT Solutions
Cubes And Cube Roots
6 Solutions
Exercise:
All Exercises
EXERCISE 6.1
EXERCISE 6.2
Q1
EXERCISE 6.1
Which of the following numbers are not perfect cubes?
(i)
216
(ii)
128
(iii)
1000
(iv)
100
(v)
46656
Q2
EXERCISE 6.1
Find the smallest number by which each of the following numbers must be multiplied to obtain a perfect cube.
(i)
243
(ii)
256
(iii)
72
(iv)
675
(v)
100
Q3
EXERCISE 6.1
Find the smallest number by which each of the following numbers must be divided to obtain a perfect cube.
(i)
81
(ii)
128
(iii)
135
(iv)
192
(v)
704
Q4
EXERCISE 6.1
Parikshit makes a cuboid of plasticine of sides 5 cm, 2 cm, 5 cm. How many such cuboids will he need to form a cube?
Q1
EXERCISE 6.2
Find the cube root of each of the following numbers by prime factorisation method.
(i)
64
(ii)
512
(iii)
10648
(iv)
27000
(v)
15625
(vi)
13824
(vii)
110592
(viii)
46656
(ix)
175616
(x)
91125
Q2
EXERCISE 6.2
State true or false.
(i)
Cube of any odd number is even.
(ii)
A perfect cube does not end with two zeros.
(iii)
If square of a number ends with 5, then its cube ends with 25.
(iv)
There is no perfect cube which ends with 8.
(v)
The cube of a two digit number may be a three digit number.
(vi)
The cube of a two digit number may have seven or more digits.
(vii)
The cube of a single digit number may be a single digit number.