Last updated at Jan. 3, 2019 by Teachoo

Transcript

Ex 3.6, 2 What is the HCF of two consecutive (a) numbers? Two consecutive numbers can be 9, 10 HCF of 9 & 10 3|9 3|3 |1 2|10 5|5 |1 9 = 3 × 3 10 = 2 × 5 Since there are no common factor HCF = 1 Ex 3.6, 2 What is the HCF of two consecutive (b) even numbers? Two consecutive even numbers can be 10, 12 2|10 5|5 |1 2|12 2|6 3|2 |1 HCF of 10 & 12 Ex 3.6, 2 What is the HCF of two consecutive (c) odd numbers? Two consecutive odd numbers can be 9, 11 HCF of 9 & 11 3|9 3|3 |1 2|11 2|1 9 = 3 × 3 11 = 11 Since there are no common factor HCF = 1

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.