A Factor tree looks like this: ... 42 ... / . \ ..2 ...21 ....... / . \ .......3 . 7 So the prime factors of 42 are 2 x 3 x 7
84 42 2 21 2 2 square root of 21 84 2 42 factor tree 6 7 2 3
18 9,2 3,3,2 30 15,2 5,3,2 42 21,2 7,3,2
Here are factor trees for 12 and 42: 12 - 2 - 6 - 2 - 3 42 - 2 - 21 - 3 - 7 The leaves in 12's factor tree are: 2, 2, and 3. The leaves in 42's factor tree are: 2, 3, and 7. The longest common sub-sequence of the leaf lists is: 2, 3. Therefore, multiply 2 by 3 and we get that 6 is the gcf of 12 and 42.
NO!!! 42 is a multiple of '6'. ( 6 x 7 = 42) However, 6 is a factor of 42.
42 21,2 7,3,2
42 21,2 7,3,2
42 21,2 7,3,2
42 21,2 7,3,2
42 21,2 7,3,2
42 21,2 7,3,2
A Factor tree looks like this:... 42... / . \..2 ...21....... / . \.......3 . 7So the prime factors of 42 are 2 x 3 x 7
A Factor tree looks like this: ... 42 ... / . \ ..2 ...21 ....... / . \ .......3 . 7 So the prime factors of 42 are 2 x 3 x 7
42 21,2 7,3,2
Use a factor tree. 42 21,2 7,3,2
426,72,3,7
2, 3, 7