They are all multiples.
There cannot be common multiples of a single number such as 345. Common multiples are multiples that two or more numbers have in common.
It is 3
the common multiples are most all of the multiples of 8
CJ:there are no common multiples for 25
Those are known as "common multiples". The smallest POSITIVE of these common multiples is called the "least common multiple".
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All multiples of 840 are common multiples of 60 and 280
there are infinite amount of common multiples.
The GCF is 1.
The GCF is 3.
Common multiples are multiples that go into the number you are trying to find the common multiple of.Multiply the numbers together.