find the H.C.F of 66 , 72 with index notation form.
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sorry I don't know Index notation method so I am solving it normally.
the factors of 66 = 1, 2, 3, 6, 11, 22, 33, 66.
the factors of 72 = 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72.
the common factor between them are = 1, 2, 3, 6.
the highest common factor is = 6
so the HCF of 66 and 72 is 6
hope It will be helpfull for you.
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