They are 24, 30 and 36
Three numbers.
Three of them.
1020, 1040 and 1060
multiples of 3 ... 21, 24, 27, 30 (between means leave out 30 multiples of 6 ... 24, 30 so the answer is 24
Multiples of 5 are not prime numbers except 5, so there are none. But, there are prime numbers between 20 and 40, like 23, 29, 31 and 37.
Three numbers.
The multiples of 4 between 20 and 40 are 24, 28, 32, and 36.
Multiples of what? This can't be answered.
The first three multiples of 10 are 10, 20 and 30. Since numbers don't stop, there are no last three.
They are the same as the even numbers in that range.
There are 457 such numbers.
20, 40, 60, 80, 100, 120, 140, 160, 180, 200 . . .
Three of them.
20 percent.
1020, 1040 and 1060
All the numbers from 2 to 19 are multiples of prime numbers.
21