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yep e.g 18 and 17,,, 24 and 23...... :(
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Why is every prime number greater then 2 an odd number?
Because if they were even they would be a multiple of 2 and thus not prime.
What prime number can you make out of 0123456789?
Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
Why is every multiple of 5 a composite number?
Not all (5 is prime) but every multiple of 5 greater than 5 is composite because they have more than two factors. Every multiple of any integer greater than one is composite.
Is every multiple of 5 a composite number true or false?
False. A composite number is a positive integer greater than 1 that has more than two distinct positive divisors. Every multiple of 5 is not a composite number, as 5 itself is a prime number with only two distinct positive divisors, 1 and 5.
Does the exception for two and three every prime number on a hundred chart is either one more or one less than a multiple of what?
In that range, every prime number is either one more or one less than a multiple of 4. This also works for 6.
Is every multiple next to a multiple of six always a prime number?
no
Why is every prime number greater then 2 an odd number?
Because if they were even they would be a multiple of 2 and thus not prime.
Is there a prime number that is a multiple of 21?
No, it is not possible. Every multiple of 21 is a composite number. 21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors. And a prime number has only two factors so, any multiple of 21 can't be prime.
Is every multiple of seven a composite number?
Yes except 7 itself which is a prime number
Is every 2 digit multiple of 6 is next to a prime number?
Yes that is correct
Is every 2-digit multiple of 6 is next to a prime number?
Yes, they are.
Is 2008 a prime number?
No, you can easily see that this is an even number, so it is a multiple of 2.2 IS A PRIME NUMBER!!Any number that is a multiple of a prime number is NOT a prime.
What prime number can you make out of 0123456789?
Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
Why is every multiple of 5 a composite number?
Not all (5 is prime) but every multiple of 5 greater than 5 is composite because they have more than two factors. Every multiple of any integer greater than one is composite.
Is 15 a prime number why or why not?
No... Every whole number that ends with a 5 includes 5 as a factor (is a multiple of 5).
What is a multiple of 7 that is a prime number?
There is not a multiple of 7 that is prime.
What number is both a prime number and a multiple of 5?
number is both a prime number and a multiple of 5 = 5
