# NCERT Solutions for Class 8 Maths Chapter 7

NCERT Solutions for Class 8 Maths Chapter 7 CUBE AND CUBE ROOTS Exercise 7.1 and Exercise 7.2 in English Medium as well as Hindi Medium updated for new academic year 2021-2022 based on latest NCERT books for new session.

Download Prashnavali 7.1 and Prashnavali 7.2 in Hindi Medium free to download in PDF or view online. NCERT Solutions 2021-22 are updated for all the students following latest CBSE Curriculum 2021-22. Class 8 Maths solutions are now available in updated form based on updated NCERT Books 2021-2022 for all the board based on CBSE.## NCERT Solutions for Class 8 Maths Chapter 7

### Class 8 Maths Chapter 7 all Exercises Solution

Class: 8 | Mathematics |

Chapter 7: | Cube and Cube Roots |

### Class 8 Maths Chapter 7 Solutions

Class 8 Maths Chapter 7 Cube and Cube Roots all exercises in English as well as Hindi Medium or View in Video Format are given to download in PDF form. Download Class 8 Maths App for offline use. All the offline apps work without internet, once downloaded.

### 8 Maths Chapter 7 Solutions in English Medium

### 8 Maths Chapter 7 Solutions in Hindi Medium

#### Class 8 Maths Exercise 7.1 Solutions in Video

#### Class 8 Maths Exercise 7.2 Solutions in Video

### Important Terms about Class 8 Maths Chapter 7

##### Find the smallest number by which 243 must be multiplied to obtain a perfect cube?

Prime factors of 243 = 3 x 3 x 3 x 3 x 3

Here 3 does not appear in 3’s group.

Therefore, 243 must be multiplied by 3 to make it a perfect cube.

##### Find the smallest number by 81 must be divided to obtain a perfect cube?

Prime factors of 81 = 3 x 3 x 3 x 3.

Here one factor 3 is not grouped in triplets.

Therefore 81 must be divided by 3 to make it a perfect cube.

In Chapter 7 Cube and Cube Roots, we will learn how to find Cube or Cube roots of a number using various tricks. The prominent method to find cube roots of a number is prime factorization method and making the group of 3 at a time. There are another popular methods like adding consecutive odd number to get cube of a number. On the basis of cube and cube roots, some applications such as to find the smallest perfect cube less than or more than the given number. During the calculation of cube and cube roots, we should keep the following things in mind like Cube of any odd number is odd, A perfect cube does not end with two zeros, If square of a number ends with 5, then its cube ends with 25, etc.

##### How to find Cube Roots

The cube root of any number can generally be easily determined by the prime factorization method. This method is the easiest and most effective. The square and square root extract, as in Lesson 6, and the cube and cube root as given in this lesson, are important for both successive classes.