Question

What is highest common factor of 12 and 18?

Answer 1

Heya! 
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Here is your answer dear :-

Question :- What is highest common factor of 12 and 18?

Answer :- The common factors of 12 and 18 are 1 , 2 , 3 and 6 so thus 6 is the highest common factor ( HCF ) of 12 and 18 ! 
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Hope this helps!