Question

How to find the common multiple of 15 and 30?

Answer 1

well 15*2=30 and 30*1=30

Answer 2

3,5,15.

Answer 3

common multiple is 30

Answer 4

15 and 20 sorry.

Answer 5

ok

well lets use the first one as an example

15=3*5
30=3*3*5*5

so the greatest common divisor is 3*5=15

and the product of 15*30 is 15(30)

all you have to to find the lcm of two numbers is do their product divided by their gcd

here we say 15(30)/15=30

-----------------------------------------
now the other problem we have
15=3*5
20=2*2*5

gcd is 5

there product is 15*20=15(20)

so the product divided by the gcd is (15)(20)/5=15(4)=60

so 60 is the least common multiple

Answer 6

I need two multiples.

Answer 7

two multiples of the common multiple?

Answer 8

for the second one just do 60times some integer
like do 60*2=120 this is a common multiple of 15 and 20

Answer 9

Also find the greatest common multiple of 36 and 54.

Answer 10

wow are you sure?

Answer 11

greatest common multiple?

Answer 12

thats impossible

Answer 13

Sorry. find the GCF of35 and 54.

Answer 14

ok thats possible lol

Answer 15

35=5*7
54=2*3*3*3
write prime factorizations for both like i did here
there are no common factors written above for 35 and 54

so we could
write
35=1*35
54=1*54

so the gcf of 35 and 54 is 1

Answer 16

But the answer are 36,30,18 and 72.

Answer 17

what are you talking about?

Answer 18

The answer there are for this problems are 36, 30,18 and 72.

Answer 19

the gcf of 35 and 54 is 1

Answer 20

The answer there are for this problems are 36, 30,18 and 72.

Answer 21

then you asked the wrong question
the gcf gives you only one number