30 (30 x 7, 30 x 15)
the only factor (divisor) between 30 and 64 are 2, this is also a factor of 42 & 196 working upwards: 1 is always a factor of integers 2 is a factor of all even numbers 3 is a factor of 30 & 42, but not 64 or 196 4 is a factor of 64 & 196, but not 30 or 42 5 is a factor of 30, but not the others 6 is a factor of 30 & 42, but not 64 or 196 7 is a factor of 42, but not the others 8 is a factor of 64, but not the others 9 is not a factor of any of the numbers 10 is a factor of 30, but not the others I could continue, but it gets worse from there, with only occasional numbers being factors...
21 and 28.
14 and 21, and 21 and 28 are the number pairs between 15 and 30 that have 7 as their greatest common factor.
Find the GCF. Example: 30/42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Select the common factors, 2 x 3 = 6, the GCF Divide them. 30/6 = 5 42/6 = 7 The simplest form is 5/7
The greatest common factor of 7 and 30 is 1.
210 (30*7 & 70*3)
Oh, dude, let me break it down for you. So, a factor is basically a number that divides another number without leaving a remainder, right? Well, 7 is not a factor of 30, but it is a factor of 40. Like, 7 goes into 40 five times with no leftovers, so yeah, 7 is totally a factor of 40.
28
7
7.1667
30 (30 x 7, 30 x 15)
no. Actually 2,3,&5 only
21 and 28
30/35 factor out 5 5*6/5*7 since 5 appears as factor in numerator and denominator it can be canceled = 6/7 --------simplest form
21 and 28 have a GCF of 7.
The greatest common factor of 30, 35, and 40 is 5. (30/5 = 6), (35/5 = 7), and (40/5 = 8)