Multiples of what?
This can't be answered.
The Least Common Multiple (LCM) of the numbers 30, 20 is 60.
The least common multiple of the numbers 20 and 30 is 60.
The least common multiple of the numbers 30, 50 and 20 is 300.
20, 30, 40, 50, 60, 70, 80, 90.
The composite numbers between 20 and 30 are: 20 21 22 24 25 26 27 28 30
The numbers 23 and 29 are the only prime numbers between 20 and 30
There are two prime numbers between 20 and 30 which are 23 and 29
The least common multiple of 20 , 40 , 30 = 120
20 and 30 15 and 60
The prime numbers between 20 and 30 are 23 and 29.
"between" requires two numbers, for example, between 20 and 30 or between 20 and 1000. You have not specified the other number.
The prime numbers between 20 and 30 are 23 and 29.