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The factors of 105 are 3,5, & 7.
The factors of 63 are 3,3, & 7.
One lot of '3' and one lot of '7' is common to both numbers.
Hence 3 x 7 = 21 , which is the HCF of 105,& 63.
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Earn +20 ptsQ: What is the highest common factor of 105 and 63?
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Continue Learning about Other Math
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63 and 84's highest common factor is 21.
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The least common multiple of 21, 42, 63, and 105 is 630.
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