The set is: 20, 24, 28.
multiples of 3 ... 21, 24, 27, 30 (between means leave out 30 multiples of 6 ... 24, 30 so the answer is 24
They are 24 and 28.
They are 21 and 28
24, 27, 30
They would be 10, 20, 30, and 40
multiples of 3 ... 21, 24, 27, 30 (between means leave out 30 multiples of 6 ... 24, 30 so the answer is 24
They are 21 and 28
They are 24 and 28.
Multiples of what? This can't be answered.
24, 27, 30
21 and 28 are the two multiples.
24
Multiples of 10 include any number ending in zero. For them to be common, they need to be compared to another set of multiples.
They are 24, 30 and 36
They would be 10, 20, 30, and 40
10 ,20 ,30 ,40 ,50
There are six: 5, 10, 15, 20, 25, 30.