Question

find the H. C. F of 42,63,105. by long division method​

Answer 1

Answer:

The greatest common factor of  

42

,

63

,

and

105

is  

21

Explanation:

What is the greatest common factor (GCF)?

That is the largest number that will divide into all those given.

To find it, the smallest prime numbers should be divided into each one. Prime numbers are: 2, 3, 5, 7, 11, 13, 17, 19.

Looking at  

42

,

63

,

105

,

we can see that the first is divisible by  

2

, the second by  

3

and the third by  

5

:

42

2

=

21

and  

63

3

=

21

and  

105

5

=

21

Each division results in the same number, so that is the GCF.

Answer 2

Step-by-step explanation:

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