A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common.
One way to determine the greatest common factor is to find all the factors of the numbers and compare them.
The factors of 15 are 1, 3, 5, and 15.
The factors of 17 are 1 and 17
The only common factor is 1. Therefore, the greatest common factor is 1.
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1 because 17 has no other factors other than one and itself, and 17 is not a factor of 15.
1 is the greatest common factor...something else that they have in common is that they are all two digit numbers.
The greatest common factor of 34 , 17 = 17
17 is the greatest common factor - it goes into 17 once, and 51 three times.
Greatest common factor of 51 and 34 is 17.
17