Question

What is the GCF of 20 and 30?

Answer 1

any ideas?

Answer 2

Uhhhh. 60? Or is that the LCF?

Answer 3

yes

Answer 4

Uhhh, idk.

Answer 5

@jdoe0001

Answer 6

start by listing the factors of 20

Answer 7

20,40,60,80,100,120,140,160,180,200

Answer 8

those are multiples, not factors

Answer 9

what numbers go evenly INTO 20?

Answer 10

1,2,4,

Answer 11

keep going, you're missing some.

Answer 12

1,2,4,5,10

Answer 13

good, let's not forget 20

so our factors of 20 are: 1,2,4,5,10,and 20
now list the factors of 30

Answer 14

1,2,3,5,6,10,15,30

Answer 15

excellent! now compare the two lists. what numbers appear in both lists?

Answer 16

1,2,5,10

Answer 17

good! now, look at that list you just wrote. which one is the biggest?

Answer 18

10

Answer 19

good, so 10 is your GCF ~

Answer 20

Ohhh. Thank you.

Answer 21

Now ive got like 16 more math questions but ill try and figure those out myself.

Answer 22

Least Common Multiples :(

Answer 23

there are fo0ur people here we can all help you