A Prime number is a number that can only be divided by 1 and itself. While 5 can only be divided by 1 and 5, 9 can be divided by 1, 9 and 3. So 9 is not a prime number, 5 is.
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5 is a prime number, but not 9, because you can do 3*3=9
Out of 9, 6, and 5, five is the prime number.
5 is a prime number while 9 & 8 are compositenumbers.
2, 3, 5 are prime numbers but 9 is not a prime number
5 is a prime number. The others are not.