NCERT Solutions For Class 8 Maths Chapter 7 Cubes and Cube Roots Ex 7.1
Here, Below you all know about NCERT Solutions for Class 8 Maths Chapter 7 Cubes and Cube Roots Ex 7.1 Question Answer. I know many of you confuse about finding this Chapter 7 Cubes and Cube Roots Ex 7.1 Of Class 8 NCERT Solutions. So, Read the full post below and get your solutions.
| Textbook | NCERT |
| Board | CBSE |
| Category | NCERT Solutions |
| Class | Class 8 |
| Subject | Maths |
| Chapter | Chapter 7 |
| Exercise | Class 8 Chapter 7 Cubes and Cube Roots Exercise 7.1 |
| Number of Questions Solved | 6 |
NCERT Solutions for Class 8 Maths Chapter 7 Cubes and Cube Roots Ex 7.1
NCERT TEXTBOOK EXERCISES
Question 1. Which of the following numbers are not perfect cubes?
(i) 216
(ii) 128
(iii) 1000
(iv) 100
(v) 46656
Solution.
(i) 216
(ii) 128
(iii) 1000
(iv) 100
(v) 46656
Question 2. Find the smallest number by which each of the following numbers must be multiplied to obtain a perfect cube.
(i) 243
(ii) 256
(iii) 72
(iv) 675
(v) 100
Solution.
(i) 243
(ii) 256
(iii) 72
(iv) 675
(v) 100
Question 3. Find the smallest number by which each of the following numbers must be divided to obtain a perfect cube.
(i) 81
(ii) 128
(iii) 135
(iv) 192
(v) 704
Solution.
(i) 81
(ii) 128
(iii) 135
(iv) 192
(v) 704
Question 4. 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?
Solution.
Volume of a cuboid = 5 x 2 x 5 cm3.
Since there is only one 2 and only two 5’s in the prime factorization, so, we need 2 x 2 x 5, i.e., 20 to make a perfect cube. Therefore, we need 20 such cuboids to make a cube.
NCERT Solutions for Class 8 Maths Chapter 7 Cubes and Cube Roots Exercise 7.1 PDF
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