Oh, dude, common multiples of 5 and 3? That's like when you find numbers that both 5 and 3 can divide into evenly. So, like, the first few common multiples would be 15, 30, 45, and so on. It's basically just a fancy way of saying numbers that these two buddies can both hang out with.
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There is an infinite number of common multiples for 5 and 3. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder).
multiples of 3 : 3,6,9,12,15,18,21,24, etc.......
multiples of 5 : 5,10,15,20,25,30,35,40, etc.........
three and five both have the multiple 15 therefore the answer is 15
60 and its multiples
Since the lowest common multiple of 3 and 5 is 15, the common multiples of 3 and 5 are the multiples of 15: 30, 45, 60, 75, 90, etc...
There are infinitely many common multiples of 3, 5 and 7, each one 105 larger than the previous one. Or to put it another way: the common multiples of 3, 5 and 7 are the multiples of their lowest common multiple which is 105. ie their common multiples are all the multiples of 105, of which there is no end - there is an infinite number of multiples of 105 (or any other number [except zero]).
lcm(2, 3, 5) = 30 → 2 digit common multiples are 30, 60, 90.
The LCM of 3 and 5 is 15. The multiples of 3 are , 6, 9, 12, 15, and so on. The multiples of 5 are 5, 10, 15, and so on. The LCM is 15.