5 yes
7 yes
9 no = 3 x 3
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Prime numbers from 1 to 9 are: 2 3 5 and 7
The prime numbers from 1 to 9 are 2, 3, 5 and 7.
The prime numbers between 1 and 9 are 2, 3, 5, and 7.
The prime numbers (factors) of 75 are: 3 and 5
7 is a prime number but 9 is a composite number