Multiples of what?
This can't be answered.
The least common multiple of the numbers 20 and 30 is 60.
The Least Common Multiple (LCM) of the numbers 30, 20 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
To find the two-digit counting numbers less than 30, we consider the numbers from 10 to 29, which gives us 20 two-digit numbers. The multiples of 20 that are two-digit numbers are 20. Since 20 is already included in the count of two-digit numbers less than 30, the total remains 20. Therefore, there are 20 two-digit counting numbers that are either less than 30 or a multiple of 20.
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.