+37097 16 = 2 x 2 x 2 x 2
42 = 2 x 3 x 7 As you can see, the GCF of these two is ' 2 '
+37097 16 = 2 x 2 x 2 x 2
42 = 2 x 3 x 7 As you can see, the GCF of these two is ' 2 '
+40 Yes.
The greatest common factor of two numbers is the highest factor (biggest number) that can divide both numbers without leaving a remainder.
Therefore, by listing all the factors of 16 and 42 you'll see that:
16= 1, 2, 8, 16
42= 1, 2, 3, 6, 7, 14, 21, 42
So therefore, from the above listing you that the highest number that can divide both numbers without leaving a remainder is 2.
It cannot be 16, because as you can see 16 is not a factor of 42 and it cannot be greater that 16 because that factor must be able is divide a number without leaving a remainder (so anything greater than 16 gives a decimal). So the factor has to be less than 16.
Hope that helps.
