There are four: 2, 3, 5 and 7
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7 is one prime number between 2 and 10.
The only prime number between 5 and 10 is 7.
The number of prime numbers between 1 and 10 is 4. Those are 2, 3, 5, and 7. The number one is not included in this list, because it is not considered prime.
17The prime numbers between 10 and 20 are 11, 13, 17 and 19. There is only one square number between 10 and 20: 16. Using the criteria given, the number that fits is 17.
There are 4 numbers that are prime between the number 10 and 20. They are 11, 13, 17, and 19.