yep e.g 18 and 17,,, 24 and 23...... :(
Because if they were even they would be a multiple of 2 and thus not prime.
Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
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.
No, not every two-digit multiple of six is next to a prime number. A multiple of six will always be an even number, divisible by both 2 and 3. Prime numbers, on the other hand, are only divisible by 1 and themselves. Therefore, there will be even numbers that are multiples of six that are not next to prime numbers.
Yes. A prime number is a multiple of 1.
no
Because if they were even they would be a multiple of 2 and thus not prime.
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.
Yes except 7 itself which is a prime number
Yes, they are.
Yes that is correct
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.
Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
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.
No... Every whole number that ends with a 5 includes 5 as a factor (is a multiple of 5).
number is both a prime number and a multiple of 5 = 5
It is not possible for any multiple of a prime number to be prime.