Question

find the HCF of 84 and 105

Answer 1

hye
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we know that we have to find the hcf of 84 and 105

factors of 84 =1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42 and 84
factors of 105 =1, 3, 5, 7, 15, 21, 35, 105 

we find 7 is the highest factor
hence  HCF of 84 and 105 is 7.
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hope it helps

Answer 2

hey;-)
the prime factorization of 84 =2×2×3×7
and,of 105 =3×5×7
to find the HCF
we multiple all the prime factor common to both the numbers
so,
3&7 is common from both of the number
therefore 3×7=21 is the hcf of the 84 &105