How to find the common multiple of 15 and 30?

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

3,5,15.

common multiple is 30

15 and 20 sorry.

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

I need two multiples.

two multiples of the common multiple?

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

Also find the greatest common multiple of 36 and 54.

wow are you sure?

greatest common multiple?

thats impossible

Sorry. find the GCF of35 and 54.

ok thats possible lol

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

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

what are you talking about?

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

the gcf of 35 and 54 is 1

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

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

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