How to find square root by PRIME FACTORISATION METHOD

Square and square roots of Class 8

Obtain the given number.

Resolve the given number into prime factors by successive division.
Make pairs of prime factors, such that both the factors in each pair are equal. Since the number is a perfect square, so we can make pairs.
Take one factor from each pair.
Find the product of factors obtained in above step which is the required square root.

e.g. (a) 420 = 2*210 = 2*2*105 = 2*2*5*21

(b) 420 = 42*10 = 6*7*5*2 = 3*2*7*5*2 = 2^2 * 3 * 5 * 7

(c)

∴

How to find square root by PRIME FACTORISATION METHOD

CBSE NCERT Solutions for Class 8 Maths

class 8 maths NCERT solutions Chapter 1: Rational Numbers

class 8 maths NCERT solutions Chapter 2: Linear Equations in One Variable

class 8 maths NCERT solutions Chapter 3: Understanding Quadrilaterals

class 8 maths NCERT solutions Chapter 4: Practical Geometry

class 8 maths NCERT solutions Chapter 5: Data Handling

class 8 maths NCERT solutions Chapter 6: Square and Square Roots

class 8 maths NCERT solutions Chapter 7: Cube and Cube Roots

class 8 maths NCERT solutions Chapter 8: Comparing Quantities

NCERT Class 8 Maths solution Chapter 9: Algebraic Expressions and Identities

class 8 maths NCERT solutions Chapter 10: Visualizing Solid Shapes

class 8 maths NCERT solutions Chapter 11: Mensuration

class 8 maths NCERT solutions Chapter 12: Exponents and Powers

class 8 maths NCERT solutions Chapter 13: Direct and Inverse Proportions

class 8 maths NCERT solutions Chapter 14: Factorization

class 8 maths NCERT solutions Chapter 15: Introduction to Graphs

class 8 maths NCERT solutions Chapter 16: Playing with Numbers

Notes,worksheet and solved question for Maths class 8

Check your marks in a chapter which you have complited in school from Physics Wallah chapter wise online test just click on the link given below

chapter wise online test for class 8 maths

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