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)
5
(ii)
3
(iii)
6
(iv)
7
(v)
4
Question
2
2.
Find the
cube root
of
8
125
(i)
2
5
(ii)
2
7
(iii)
2
3
(iv)
4
5
(v)
0
Question
3
3.
Find the cube root of
3375
(i)
15
(ii)
225
(iii)
18
(iv)
12
(v)
228
Question
4
4.
Find the cube of
20
(i)
403
(ii)
400
(iii)
8003
(iv)
8000
(v)
7997
Question
5
5.
Which of the following is a perfect cube?
(i)
26
(ii)
219
(iii)
64
(iv)
5
(v)
344
Question
6
6.
Which of the following is not a perfect cube?
(i)
512
(ii)
1003
(iii)
216
(iv)
8
(v)
729
Question
7
7.
The smallest number by which 2048 must be multiplied so that the product is a perfect cube is?
(i)
1
(ii)
3
(iii)
4
(iv)
0
(v)
2
Question
8
8.
The smallest number by which 128 must be divided so that the quotient is a perfect cube is?
(i)
1
(ii)
4
(iii)
0
(iv)
3
(v)
2
Question
9
9.
3
√
1
64
=
(i)
(
-1
4
)
(ii)
3
4
(iii)
1
6
(iv)
1
4
(v)
1
2
Question
10
10.
3
√
0.0080
=
(i)
0.4
(ii)
0.2
(iii)
0.1
(iv)
0.3
(v)
0.02
Question
11
11.
Simplify
3
√
125
+
3
√
1728
3
√
729
−
3
√
1331
=
(i)
-17
(ii)
(
-17
2
)
(iii)
(
-17
4
)
(iv)
(
-19
2
)
(v)
(
-15
2
)
Assignment Key
1) (i)
2) (i)
3) (i)
4) (iv)
5) (iii)
6) (ii)
7) (v)
8) (v)
9) (iv)
10) (ii)
11) (ii)
