12aleksandrowic
12aleksandrowic
30-09-2014
Mathematics
Answered
what is i hcf of 21 and 28
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mariamikayla
mariamikayla
30-09-2014
[tex]21|3 \\ 7 \ |7 \\ 1 \\\\ 21=3*7 \\\\ 28|2 \\ 14|2 \\ 7 \ |7 \\ 1 \\\\ 28=2^2*7 \\\\ H.C.F(21;28)\to\boxed{7}[/tex]
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AL2006
AL2006
30-09-2014
The factors of 21 are 1, 3, 7, and 21 .
The factors of 28 are 1, 2, 4, 7, 14, and 28 .
The factors common to both numbers are 1 and 7 .
The greatest one is
7
.
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