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A Prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. yes, there are 8 digit prime numbers.
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How many 8 digit numbers are there?
8
Why is it that any 3 digit number that ends in 0 or 2 or 4 or 5 or 6 or 8 cannot be prime?
A prime number is evenly divisible only by itself and one. Any three digit number ending in 0, 2, 4, 6, or 8 is evenly divisible by 2 - so not a prime Any three digit number ending in 5 is divisible by 5, so not a prime number. The only even prime number is 2. The only prime number that ends in 5 is 5.
What numbers is a prime number 8-12-17?
17 is a prime number. 8 and 12 are not prime numbers.
You are thinking of 3 counting numbers The smallest number is 2 less than half the largest the average of the 3 numbers is 13 and one of the numbers is a 2 digit prime What are the numbers?
8, 11, and 20.
How do you determine when a three digit number is prime number?
To determine if any number is prime, one method is to check if it can be divided by any of the prime numbers less than its square root. The square root of 100 is 10 and the square root of 1000 is approximately 31.6, so any 3 digit number (100 to 999) needs to be tested for divisibility only with the prime numbers 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, and 31. Another test is that any number ending in 0, 2, 4, 5, 6, 7, or 8 cannot be prime.
