15 is all of those things.
Any multiple of 30.
No integers satisfy both conditions.
The number that is a factor of 30 and a multiple of 2 is 2. A factor of a number divides it evenly without leaving a remainder, and in this case, 2 is a factor of 30 because 30 divided by 2 equals 15. Additionally, since 2 multiplied by 15 equals 30, 2 is also a multiple of 30.
The least common factor of 30 and 42 is the smallest number that is a factor of both of them and is 1.However, I suspect that you mean either:What is the highest common factor of 30 and 42?ie what is the highest number that is a factor of both 30 and 42: hcf = 6;What is the lowest common multiple of 30 and 42?ie that is the smallest number that is a multiple of both 30 and 42 lcm = 210.
No, 30 is a multiple of 15.
The answer is 9. It is a multiple of 3. 3+3+3=9. It is less than 20: 20-9=11.It is not a prime number. It is odd, and it is not a factor of 30. 30/9=3.3333333333
9
15
There is no such number. If a multiple of 4 is a factor of 30, then 4 must also be a factor of 30, but 4 is not a factor of 30 (the factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30), thus no such number exists.
6, 18, 30, 90
Any multiple of 30.
No integers satisfy both conditions.
The number that is a factor of 30 and a multiple of 2 is 2. A factor of a number divides it evenly without leaving a remainder, and in this case, 2 is a factor of 30 because 30 divided by 2 equals 15. Additionally, since 2 multiplied by 15 equals 30, 2 is also a multiple of 30.
The least common factor of 30 and 42 is the smallest number that is a factor of both of them and is 1.However, I suspect that you mean either:What is the highest common factor of 30 and 42?ie what is the highest number that is a factor of both 30 and 42: hcf = 6;What is the lowest common multiple of 30 and 42?ie that is the smallest number that is a multiple of both 30 and 42 lcm = 210.
3, 6, 15, 30
30
There is no answer. There cannot be a lowest common multiple of a single number, such as 30, because "common multiple" means a multiple that two or more numbers have in common. Likewise, there cannot be a highest common factor of a single number, such as 3, because "common factor" means a factor that two or more numbers have in common.