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NCERT solutions Mathematics Class 8 chapter 7 Cubes and Cube Roots

Chapters

NCERT Mathematics Class 8

Mathematics Textbook for Class 8

Chapter 7 - Cubes and Cube Roots

Page 114

The following numbers are not perfect cubes?

216

 

Q 1.1 | Page 114

The following numbers are not perfect cubes?

128

Q 1.2 | Page 114

The following numbers are not perfect cubes?

1000

Q 1.3 | Page 114

The following numbers are not perfect cubes?

100

Q 1.4 | Page 114

Which of the following numbers are notperfect cubes?

46656

Q 1.5 | Page 114

Find the smallest number by which the following number must be multiplied to obtain a perfect cube.

243

Q 2.1 | Page 114

Find the smallest number by which the following number must be multiplied to obtain a perfect cube.

256

Q 2.2 | Page 114

Find the smallest number by which the following number must be multiplied to obtain a perfect cube.

72

Q 2.3 | Page 114

Find the smallest number by which the following number must be multiplied to obtain a perfect cube.

675

Q 2.4 | Page 114

Find the smallest number by which the following number must be multiplied to obtain a perfect cube.

100

Q 2.5 | Page 114

Find the smallest number by which the following number must be divided to obtain a perfect cube.

81

Q 3.1 | Page 114

Find the smallest number by which the following number must be divided to obtain a perfect cube.

128

Q 3.2 | Page 114

Find the smallest number by which the following number must be divided to obtain a perfect cube.

135

Q 3.3 | Page 114

Find the smallest number by which the following number must be divided to obtain a perfect cube.

192

Q 3.4 | Page 114

Find the smallest number by which the following number must be divided to obtain a perfect cube.

704

Q 3.5 | Page 114

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?

Q 4 | Page 114

Page 116

Find the cube root of the following numbers by prime factorisation method.

91125

Q 1.1 | Page 116

Find the cube root of the following numbers by prime factorisation method.

64

Q 1.1 | Page 116

Find the cube root of the following numbers by prime factorisation method.

512

Q 1.2 | Page 116

Find the cube root of the following numbers by prime factorisation method.

10648

Q 1.3 | Page 116

Find the cube root of the following numbers by prime factorisation method.

27000

Q 1.4 | Page 116

Find the cube root of the following numbers by prime factorisation method.

15625

Q 1.5 | Page 116

Find the cube root of the following numbers by prime factorisation method.

13824

Q 1.6 | Page 116

Find the cube root of the following numbers by prime factorisation method.

110592

Q 1.7 | Page 116

Find the cube root of the following numbers by prime factorisation method.

46656

Q 1.8 | Page 116

Find the cube root of the following numbers by prime factorisation method.

175616

Q 1.9 | Page 116

State true or false.

Cube of any odd number is even.

Q 2.1 | Page 116

State true or false.

A perfect cube does not end with two zeroes.

Q 2.2 | Page 116

State true or false.

If square of a number ends with 5, then its cube ends with 25.

Q 2.3 | Page 116

State true or false

There is no perfect cube which ends with 8.

Q 2.4 | Page 116

State true or false.

The cube of a two digit number may be a three digit number.

Q 2.5 | Page 116

State true or false.

The cube of a two digit number may have seven or more digits.

Q 2.6 | Page 116

State true or false.

The cube of a single digit number may be a single digit number.

Q 2.7 | Page 116

You are told that 1331 is a perfect cube. Can you guess without factorization what is its cube root? Similarly, guess the cube roots of 4913, 12167, 32768

Q 3 | Page 116

NCERT Mathematics Class 8

Mathematics Textbook for Class 8
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