# NCERT solutions for Class 8 Maths chapter 7 - Cubes and Cube Roots [Latest edition]

## Chapter 7: Cubes and Cube Roots

Exercise 7.1Exercise 7.2
Exercise 7.1 [Page 114]

### NCERT solutions for Class 8 Maths Chapter 7 Cubes and Cube RootsExercise 7.1 [Page 114]

Exercise 7.1 | Q 1.1 | Page 114

The following numbers are not perfect cubes?

216

Exercise 7.1 | Q 1.2 | Page 114

The following numbers are not perfect cubes?

128

Exercise 7.1 | Q 1.3 | Page 114

The following numbers are not perfect cubes?

1000

Exercise 7.1 | Q 1.4 | Page 114

The following numbers are not perfect cubes?

100

Exercise 7.1 | Q 1.5 | Page 114

Which of the following numbers are notperfect cubes?

46656

Exercise 7.1 | Q 2.1 | Page 114

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

243

Exercise 7.1 | Q 2.2 | Page 114

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

256

Exercise 7.1 | Q 2.3 | Page 114

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

72

Exercise 7.1 | Q 2.4 | Page 114

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

675

Exercise 7.1 | Q 2.5 | Page 114

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

100

Exercise 7.1 | Q 3.1 | Page 114

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

81

Exercise 7.1 | Q 3.2 | Page 114

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

128

Exercise 7.1 | Q 3.3 | Page 114

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

135

Exercise 7.1 | Q 3.4 | Page 114

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

192

Exercise 7.1 | Q 3.5 | Page 114

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

704

Exercise 7.1 | Q 4 | 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?

Exercise 7.2 [Page 116]

### NCERT solutions for Class 8 Maths Chapter 7 Cubes and Cube RootsExercise 7.2 [Page 116]

Exercise 7.2 | Q 1.01 | Page 116

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

64

Exercise 7.2 | Q 1.02 | Page 116

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

512

Exercise 7.2 | Q 1.03 | Page 116

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

10648

Exercise 7.2 | Q 1.04 | Page 116

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

27000

Exercise 7.2 | Q 1.05 | Page 116

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

15625

Exercise 7.2 | Q 1.06 | Page 116

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

13824

Exercise 7.2 | Q 1.07 | Page 116

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

110592

Exercise 7.2 | Q 1.08 | Page 116

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

46656

Exercise 7.2 | Q 1.09 | Page 116

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

175616

Exercise 7.2 | Q 1.1 | Page 116

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

91125

Exercise 7.2 | Q 2.1 | Page 116

State true or false.

Cube of any odd number is even.

• True

• False

Exercise 7.2 | Q 2.2 | Page 116

State true or false.

A perfect cube does not end with two zeroes.

• True

• False

Exercise 7.2 | Q 2.3 | Page 116

State true or false.

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

• True

• False

Exercise 7.2 | Q 2.4 | Page 116

State true or false

There is no perfect cube which ends with 8.

• True

• False

Exercise 7.2 | Q 2.5 | Page 116

State true or false.

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

• True

• False

Exercise 7.2 | Q 2.6 | Page 116

State true or false.

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

• True

• False

Exercise 7.2 | Q 2.7 | Page 116

State true or false.

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

• True

• False

Exercise 7.2 | Q 3 | 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

## Chapter 7: Cubes and Cube Roots

Exercise 7.1Exercise 7.2

## NCERT solutions for Class 8 Maths chapter 7 - Cubes and Cube Roots

NCERT solutions for Class 8 Maths chapter 7 (Cubes and Cube Roots) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Class 8 Maths solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 8 Maths chapter 7 Cubes and Cube Roots are Some Interesting Patterns of Cube Numbers, Concept of Cube Number, Concept of Cube Root, Cube Root Through Prime Factorisation Method, Finding the Cube Roots of the Cubic Numbers Through the Estimation Method.

Using NCERT Class 8 solutions Cubes and Cube Roots exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 8 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 7 Cubes and Cube Roots Class 8 extra questions for Class 8 Maths and can use Shaalaa.com to keep it handy for your exam preparation