Answer :

First factorise 24 and 36, 
24=2*2*2*3
36=2*2*3*3
now take out the common ones in both and multiply them
2*2*3=12
therefore, 12 is the HCF
We have to first factorise 24 and 36
24=2*2*2*3
36=3*3*2*2
Take common from both ,i.e., 2*2*3=12
thank u.

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