All of them except for 11, 13, 17 and 19 which are prime numbers
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20 is between 10 and 30.
The question is: What is a Composite number between 10 and 20. First we must remember that a Composite number is a number that is divisible by itself, 1, and also another is considered a Composite number. Therefore, the Composite numbers between 10 and 20 are 10, 12, 14, 15, 16, 18 and 20. The other numbers are called Prime numbers.
10
18
There are 4 numbers that are prime between the number 10 and 20. They are 11, 13, 17, and 19.