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Earn +20 ptsQ: Why numbers with a five in the ones place are not prime numbers?
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What five digits are in the ones place of odd numbers?
1,3,5,7,9
What digits are in the ones place of count-by-five numbers?
Fives and zeros
Are numbers that have 2 in the ones place composite numbers?
Yes except for 2 on its own which is the only even prime number
What is prime numbers greater than 10 has a digit in the ones place?
How about: 11, 13, 17, 19 .... etc
Why number with a 5 in the ones place are not prime numbers?
Except for 5, all of them have more than two factors.
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