What is the greatest common factor of 42, 63, and 105?

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Jamiya Costa · Accepted Answer

Step 1Writing each number as the product of its &#039; factors is a quick way of finding the HCF and LCM of any number of values.                    42        −        2        ×        3        ×        7                            63        =        3        ×        3        ×        7                                                  105            =            3            ×            7            ×            5                    _                                    H        C        F        =        3        ×        7        =        21            42, 63 and 105 all have the factors 3 and 7 is common.Therefore the   H  C  F  =  21

uplakanimkk · Accepted Answer

Step 1That is the largest number that will divide into all those given.To find it, the smallest &#039; 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.

What is the greatest common factor of 42, 63, and

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