12
Numbers for which the sum of the digits is divisible by 9. This is also true for 3. There are other divisibility/multiple tests for other numbers (e.g., numbers that are divisible by 5 end in 5 or 0; numbers whose last two digits are divisible by 4 are divisible by 4)
Twelve
No, that's not true. 12 itself is a multiple of 12 (has 12 as a factor), but it doesn't have 10 as a factor. However, every multiple of 12 will have 1, 2, 3, 4, 6, and 12 as factors.
12. You need all the factors in each number to get least common multiple, 20 the two needs a 3 and another 2, the 4 needs a three and the twelve has everything it needs.
How about: 2 3 4 and 6
There is no "most common" multiple of two or more numbers, but there is a greatest common multiple if that's what you mean. But for multiples, the list of common ones goes on and on and on, since every single number in the universe is a multiple.
The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least multiple of a number is itself.
Zero and twelve don't have any common multiples.
twelve and two fifth
120
60
12
The least common multiple is the smallest number that is multiple of two or more numbers. 3: 3, 6, 9, 12 12: 12 The LCM of 3 and 12 is 12.
72
The LCM is: 60
12.5