4
They are: 21, 24, 27 and 30 which makes four of them
4
They are: 21,24,27 and 30 which makes four of them
4
5
4
11
4
6
45
10
There are ten.
20 of them.
8
20 if you include 100, 19 if you don't.
Remember 1 is not a prime number because it is only divisible by itself. 2, 3, 5, 7, 11, 13, 17, 19 These are the prime numbers between 0 and 20. In short, there are 9 prime numbers between 0 and 20.
There are ten.
20
Nine of them are evenly divisible by 5, if you include 20 and 60.
Set of odds numbers divisible by 5 between 10 and 20?
20 of them.
8
The answer is twenty but there are many more.
No number between 20 and 40 is divisible by all 4 numbers. The smallest number divisible by all 4 of those numbers is: 56
20 if you include 100, 19 if you don't.
6 12 18
There are 9 numbers evenly divisible by 10 : 10, 20, 30, 40, 50, 60, 70, 80, and 90
15