Question

find the common factors of the following numbers then the then find the HCF of 20 and 45 ​

Answer 1

 find the common factors of the     Answer is 5

1).  HCF  is highest common factor which means the biggest no. which can divide the given numbers and the remainder would be zero

2).   Factors of 20 are   1,2,3,4,10 and 20 itself

3).  Factors of 45 are 1,3,5,9,15 and 45 itself

from these we can see that HCF of 20 and 45 is 5 .

4). This mean that 5 is the greatest  integer which can divide both 20 and 45 completely .

Answer 2

Answer:

common factor is 3 and hcf if you need to do it