Greqtest Common Foclor
When you find oll the fcctors of two or more numbers, ond you find some foctors cre
the some ( common ), the lorgest of those common foctors is the Greotest Common
Foctor (GCF).
Whot ore the foctors of
l2?
1,2,3, 4, 6, ond
Whot ore the foctors of
20?
1,2,4,5,
Which ore the common
foctors? l, 2, ond
Whot
l.
ond
20
^
Y%*. .,1
I
)W
12.
List
the foctors of
List
the common foctors.
List
B.
the foctors of 12.
l
Whot
l
List
is
the GCF?
the GCF of 15 ond 20.
15.
List
the fcciors of
List
the common foctors.
3. Find
ond
&
\''*l Y& P
the GCF?
Find the GCF of 8
2. Find
4.
is
10,
12
the GCF of
the foctors of 20.
Whot
is
ihe GCF?
2l ond 35.
Lisl
the foctors of 21.
List
the common foctors.
Find the GCF of 6
qnd
List
the foctors of 35.
Whoi
;
is
the GCF?
,l8.
the foctors of
List
the foctors of 6.
List
List
the common foctors.
Whot
SuperTeocherWorksheels
-
is
the GCF?
www.superfeocherworksheefs.com
18.
Nanre
Sccre:
:
,44tl
:,::.:ii;'
ffi s.mmHms€ ffiqpre
Find the greatest
1)
Fms€qssl
20 :
=
ccF{20, 1CI) =
li'litr'1"
-i'
18,24
*f 24
Factors
GCF(18,
25,
:::
24) = -* * -i
l5
=
tactors of
25
Factorsof
l5 =
flf
F/?q
1(\
I Jl
ULI
\aJl
5)
mr*re
{*m
Factors of '10
4)
iilj
20, "l 0
Factors of
t)
.
=
{,'
1,, !
-i-,.3:-&,:]
J
-,
7,14
Factorsof
7 =
Factars af j 4
GCF{7,
--
= __'ijA ir i'\
14) =
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