Question

H.C.Fof 63,168.
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Answer 1

Answer:

63=7×3×3

168=7×3×2×2×2

CF=7,3

HCF=7×3=21

Answer 2

Answer:

21

The factors of 63 are 1, 3, 7, 9, 21 and 63. The factors of 168 are 1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84 and 168. So, the Highest Common Factor for these numbers is 21 because it divides all them without a remainder.