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Other than 5, they are multiples of 5 and have more than two factors.
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Earn +20 ptsQ: Why with a 5 in the ones place are not prime numbers?
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Why numbers with a five in the ones place are not prime numbers?
All but the number five are multiples of 5.
Why number with a 5 in the ones place are not prime numbers?
Except for 5, all of them have more than two factors.
Is it true or false that all numbers with a 0 in the ones' place are composite numbers?
It is true (as long as there are no decimal places after the ones place) because those numbers will always be divisible by 2, 5, and 10. With exception of the number zero which is neither prime nor composite.
What are the only 4 possibilities for the ones-place digits of all primes greater than 5?
The possibilities for a digit in the ones place of a prime number greater than 5 are 1, 3, 7, and 9. If a 0, 2, 4, 6, or 8 is in the ones place, the number is divisible by 2, so it would not be prime. If a 5 is in the ones place, the number is divisible by 5, so it would not be prime.
What digits are in the ones place of the numbers that have 5 as one factors?
o and 5
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