EduSahara™ Assignment
Name : Cubes and Cube Roots
Chapter : Powers and Roots
Grade : ICSE Grade VII
License : Non Commercial Use
Question
1
1.
Find the
cube root
of
125
(i)
8
(ii)
5
(iii)
2
(iv)
4
(v)
6
Question
2
2.
Find the
cube root
of
(
-64
125
)
(i)
(
-4
5
)
(ii)
(
-4
7
)
(iii)
(
-2
5
)
(iv)
(
-4
3
)
(v)
(
-6
5
)
Question
3
3.
Find the cube root of
512
(i)
8
(ii)
5
(iii)
64
(iv)
67
(v)
11
Question
4
4.
Find the cube of
26
(i)
676
(ii)
17579
(iii)
679
(iv)
17576
(v)
17573
Question
5
5.
Which of the following is a perfect cube?
(i)
30
(ii)
342
(iii)
217
(iv)
8
(v)
726
Question
6
6.
Which of the following is not a perfect cube?
(i)
512
(ii)
8
(iii)
125
(iv)
27
(v)
732
Question
7
7.
The smallest number by which 392 must be multiplied so that the product is a perfect cube is?
(i)
4
(ii)
7
(iii)
6
(iv)
8
(v)
10
Question
8
8.
The smallest number by which 5000 must be divided so that the quotient is a perfect cube is?
(i)
6
(ii)
5
(iii)
4
(iv)
7
(v)
3
Question
9
9.
3
√
1
125
=
(i)
1
5
(ii)
(
-1
5
)
(iii)
1
7
(iv)
1
3
(v)
3
5
Question
10
10.
3
√
0.1250
=
(i)
0.4
(ii)
0.05
(iii)
0.5
(iv)
0.6
(v)
0.7
Question
11
11.
Simplify
3
√
125
+
3
√
64
3
√
512
−
3
√
343
=
(i)
9
(ii)
10
(iii)
7
(iv)
12
(v)
8
Assignment Key
1) (ii)
2) (i)
3) (i)
4) (iv)
5) (iv)
6) (v)
7) (ii)
8) (ii)
9) (i)
10) (iii)
11) (i)
