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Alivia Soto
Mathematics
23 August, 19:42
What is the greatest common factor of 63 and 21
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Krish Beard
23 August, 19:44
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Factors of 21={1,3,7,21}
Factors of 63={1,3,7,9,21,63}
the highest common factor (HCF) is 21.
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Anderson Vaughn
23 August, 19:58
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Answer: 21
Step-by-step explanation: To find the greatest common factor for the numbers 21 and 63, make a factor tree for each of the numbers.
21 is 3 * 7.
63 is 3 * 21 and 21 is 3 * 7.
The greatest common factor therefore is 3 * 7 or 21.
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