what is the greatest common factor for 78 and 91 and how do you get it...??
Thanks
2007-03-27 02:55:24 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Their greatest common factor is 13
Because 78=3X2X13
91=13X7
2007-03-27 03:03:55 · answer #1 · answered by Anonymous · 2⤊ 1⤋
Greatest Common Factor Of 13 And 39
2017-01-17 08:36:02 · answer #2 · answered by ? 3 · 0⤊ 1⤋
The greatest common factor of 78 and 91 is 13. 13 is the largest number that is a factor of both 78 and 91.
How do you find this? easy. Use a factor tree on both 78 and 91.
78 = 2 x 3 x 13
91 = 7 x 13
When you see this list just look for all the numbers that are common to both. Here you see only one number common to both and that is 13. Therefore it is the GCF of both numbers.
2007-03-27 03:04:45 · answer #3 · answered by Anonymous · 3⤊ 0⤋
The answer is 13.
The Greatest Common Factor is the largest number that will divide evenly into each number.
First find the numbers that can be multiplied together to get each number.
78 91
/ \ / \
2 39 7 13
/ \
3 13
13 is the only number they have in common so that is the Greatest common factor.
If they had more than one number in common you would just multiply all the numbers that are in common together to get your answer.
2007-03-27 03:06:48 · answer #4 · answered by jennifer 5 · 3⤊ 1⤋
13. You have to factor each number. 78 is 39 x 2, which if further factored to 13 x 3 x 2.
91 is 13 x 7.
So the greatest factor common to both is 13.
2007-03-27 03:06:32 · answer #5 · answered by Carlos R 5 · 3⤊ 0⤋
Factorize both numbers completely:
78=2x3x13
91=7x13
GCF-take each factor the LEAST number of times it appears in any number:
GCF=13
2007-03-27 03:06:59 · answer #6 · answered by Anonymous · 3⤊ 0⤋
The greatest common factor means the highest # that will go into both. Do your own dividing.
2007-03-27 03:06:58 · answer #7 · answered by Rebecca A 4 · 2⤊ 1⤋
well you see what two numbers can multiply yo get those numbers than fine the greatest factor of the numbers
78 91
2x39 1x91
1x78 13x7
13x6
26x3
2007-03-27 03:11:45 · answer #8 · answered by Anonymous · 1⤊ 0⤋
91 is the greatest because each numerical just could divide by that
2007-03-27 03:00:48 · answer #9 · answered by sastro 5 2 · 0⤊ 7⤋