(1, 21)(3, 7)
factor pair = 1512,1 factor pair = 756,2 factor pair = 504,3 factor pair = 378,4 factor pair = 252,6 factor pair = 216,7 factor pair = 189,8 factor pair = 168,9 factor pair = 126,12 factor pair = 108,14 factor pair = 84,18 factor pair = 72,21 factor pair = 63,24 factor pair = 56,27 factor pair = 54,28 factor pair = 42,36
How about: 14 and 21
3
1 and 567 are a factor pair of 567 since 1 x 567= 567 3 and 189 are a factor pair of 567 since 3 x 189= 567 7 and 81 are a factor pair of 567 since 7 x 81= 567 9 and 63 are a factor pair of 567 since 9 x 63= 567 21 and 27 are a factor pair of 567 since 21 x 27= 567
1 and 105 are a factor pair of 105 since 1 x 105= 105 3 and 35 are a factor pair of 105 since 3 x 35= 105 5 and 21 are a factor pair of 105 since 5 x 21= 105 7 and 15 are a factor pair of 105 since 7 x 15= 105
(21,1)(7,3) (42,1)(21,2)(14,3)(7,6) Since 21 is a factor of 42, all the factors of 21 will be included in the factor pairs of 42.
Every number has a factor pair of 1 and itself. Prime numbers have that as their only factor pair. Composite numbers have additional factor pairs. 7 = 1 x 7 9 = 1 x 9 16 = 1 x 16 and others 21 = 1 x 21 and others
The GCF is 3.
7
factor pair = 650,1 factor pair = 325,2 factor pair = 130,5 factor pair = 65,10 factor pair = 50,13 factor pair = 26,25
factor pair = 36,1 factor pair = 18,2 factor pair = 12,3 factor pair = 9,4 factor pair = 6,6
factor pair = 90,1 factor pair = 45,2 factor pair = 30,3 factor pair = 18,5 factor pair = 15,6 factor pair = 10,9 Doctor Chuck Mathdoc