Question

what is hcf of 12,18,20,30
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Answer 1

Hcf of 12,18,20,30 is 2

Answer 2

HCF of 12 , 18 , 20 , 30 is 2

Given :

The numbers 12 , 18 , 20 , 30

To find :

HCF of 12 , 18 , 20 , 30

Concept :

HCF :

For the given two or more numbers HCF is the greatest number that divides each of the numbers

Solution :

Step 1 of 3 :

Write down the given numbers

The given numbers are 12 , 18 , 20 , 30

Step 2 of 3 :

Prime factorise the given numbers

12 = 2 × 2 × 3

18 = 2 × 3 × 3

20 = 2 × 2 × 5

30 = 2 × 3 × 5

Step 3 of 3 :

Find HCF of 12 , 18 , 20 , 30

We know that for the given two or more numbers HCF is the greatest number that divides each of the numbers

Hence the required HCF

= HCF of 12 , 18 , 20 , 30

= 2

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