Last updated at Jan. 3, 2019 by Teachoo

Transcript

Ex 3.5, 9 In which of the following expressions, prime factorization has been done? (a) 24 = 2 × 3 × 4Prime factorization of 24 is ∴ 24 = 2 × 2 × 2 × 3 In the question 4 is given Which is not a prime number So, Prime factorization has not been done in the question. Ex 3.5, 9 In which of the following expressions, prime factorization has been done? (b) 56 = 7 × 2 × 2 × 2Prime factorization of 56 is ∴ 56 = 2 × 2 × 2 × 7 So Prime Factorization has been done Ex 3.5, 9 In which of the following expressions, prime factorization has been done? (c) 70 = 2 × 5 × 7 Prime factorization of 70 is ∴ 70 = 2 × 5 × 7 So Prime factorization has been done Ex 3.5, 9 In which of the following expressions, prime factorization has been done? (d) 54 = 2 × 3 × 9Prime factorization of 54 54 = 2 × 3 × 3 × 3 In this question 9 is given Which is not a prime number. So, Prime factorization has not been done in this question.

Chapter 3 Class 6 Playing with Numbers

Concept wise

- Factors and Multiples
- Perfect number
- Prime and Composite Numbers
- Sum of prime numbers
- Prime numbers from 1 to 100
- Divisibility Tests - Divisibility by 5, 10, 2
- Divisibility Tests - Divisibility by 4, 8
- Divisibility Tests - Divisibility by 3, 6, 9
- Divisibility Tests - Divisibility by 11
- Divisibility Tests - All
- Common Multiples
- Common Factors
- More Divisibility Rules
- Factor Tree
- Prime Factorisation
- Highest Common Factor
- Lowest Common Multiple
- Statement questions on LCM
- Statement questions on HCF

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.