1. HCF AND LCM © Fail to plan, Plan to fail The true father of maths

2. HCF - Highest Common Factor The highest common factor of two numbers is the largest number that is a factor of both of them The HCF of 12 and 18 is 6. To find the HCF of two numbers: List all the factors of each number (factor tree) Identity the largest factor that is in both lists For examples: Factors of 18={1,2,3,6,9,18} Factors of 24={1,2,3,4,6,8,12,24} HCF of 18 and 24=6

3. LCM- Lowest Common Multiple The lowest common multiple is the smallest number that is a multiple of both of them. The LCM of 18 and 24= 72 To find the LCM of two numbers: List the few multiples of each other Identify the smallest multiple that is in both lists For example: Multiples of 18= 18,36,54,72,90 Multiples of 24= 24,48,72,96 LCM of 18 and 24= 72

4. By Aadam Muhammed™