no.. prime numbers are numbers that can only have two factors (which are that number and one) to get that number. Ex: 2, because only 2x1=2, 5 because only 5x1=5, but NOT 6 because 6x1=1 AND 2x3=6
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No. It IS true that every whole number is either prime or composite. But there are numbers that are not whole numbers, such as 2.5, which are neither prime nor composite.
Every whole number more than 2 has to be one or the other. 83 is a prime number.
No... Every whole number that ends with a 5 includes 5 as a factor (is a multiple of 5).
There are 8. Also, by definition factors must be whole numbers because otherwise every non-zero number is a factor of every number (including prime numbers).
No.