Maths

Malo e lelei, Kia orana and greetings to you all today blog post is about Maths - HCF (Highest Common Factor)

What does HCF mean?

HCF stand for Highest Common Factor. The Highest Common Factor of two or more numbers is the largest number that is a factor of all of the given numbers.

FACTORS:      EXERCISE 

1.  List all the factors of the following numbers.

1. 6: 2 x 3 = 6
2. 12: 4 x 3 = 12
3. 7: 7 x 1 = 7
4. 15: 5 x 3 = 15
5. 36: 6 x 6 = 36

2.  List the factors of both numbers, and write down the HCF.

1. 8: 2 x 4 = 8

30: 6 x 5 = 30

HCF: The Factor of 8 =  2,4,1 and 8 

                        The Factor of 30 = 1,2,3,5,6,10,15 and 30

                        So the CF is = 2,1 and the HCF = 2

2. 5: 5 x 1 = 5

20: 4 x 5 = 20

HCF: The Factor of 5 = 1,5

                      The Factor of 20 = 1,2,4,5,10 and 20

                      The CF is : 1,5 so the HCF is = 5

3. 9: 3 x 3 = 9

24: 6 x 4 = 24

HCF: The Factor of 9 = 1,3,9   

                        The Factor of 24 = 1,2,3,4,6,8,12 and 24

                        And The HCF is = 3

4. 18: 6 x 3 = 18

60: 11 x 6 = 60

HCF: The Factor of 18 = 1,2,3,6,9 and 18    

                       The Factor of 60 = 1,2,3,4,5,6,10,12 and 60

                      The CF is: 1,2,3 and 6 so the HCF is = 6

5. 3: 1 x 3 = 3

11: 1 x 11 = 11  

HCF: 1