find gcf of 12, 90
how did u get it?
2007-04-05 15:01:00 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help
6. You list all the factors of each:
12: 1,2,3,4,6,12
90:1,2,3,5,6,9,10,15,30,45,90
Then you check each one for the highest in both. This time it's 6.
2007-04-05 15:05:21 · answer #1 · answered by Linzz 5 · 0⤊ 0⤋
Both numbers are obviously divisible by 3 -- so take that factor away
12/3 = 4
90/3 = 30
Both of these numbers are even -- so divide them by 2
4/2 = 2
90/2 = 45
It is more obvious that 45 and 2 have no common factors.
Now take the factors we found and multiply them together -- 2*3 = 6
2007-04-05 22:05:36 · answer #2 · answered by Ranto 7 · 0⤊ 0⤋
the greatest common factor for 12 and 90 would be the highest number that would go into both of them and it would be 6. because 6 can go into 12 twice and into 90 15 times.that's the greatest common factor/gcf.
2007-04-05 22:05:20 · answer #3 · answered by Ask this girl 5 · 0⤊ 0⤋
6
rewrite as prime factors
12 = 2 * 2 * 3
90 = 3 * 3 * 2 * 5
they share a 2 and a 3 so 2 * 3
2007-04-05 22:04:48 · answer #4 · answered by msmthtchr 3 · 0⤊ 0⤋