Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
yes
One two digit number that is not prime and is not a multiple of 2, 3, or 5 is 49. Another such number is 91.
yep e.g 18 and 17,,, 24 and 23...... :(
9797 is the largest two digit prime number.
Yes that is correct
Yes, they are.
Every 9-digit combination of those numbers is a multiple of 3. None of them will be prime.
yes
One two digit number that is not prime and is not a multiple of 2, 3, or 5 is 49. Another such number is 91.
No two digit prime number exists that is a multiple of 7. All two digit numbers that are multiples of 7 are compositenumbers.
A prime number cannot be a multiple of seven. You might be looking for 59.
9 isn't prime, but one three-digit multiple of 18 is 108.
yep e.g 18 and 17,,, 24 and 23...... :(
no
1637143983 is not prime. Its prime factorisation is: 3 × 3 × 7321 × 24847.In the case of this number and one ninth of all integers, the fact that it is composite can be quickly determined by calculating the core digit value, the sum of all digits reduced to one digit. The core digit value of this number is 9, and every single integer with this core digit value is a multiple of 9. This can only prove that a number is composite. A core digit value other than 9 does not prove that a number is prime.
Since 5 is a prime number, then any number, which is not a multiple of 5, is relatively prime with the number 5. You can determine if a number is a multiple of 5, by looking at the ones place digit. If it is a 0 or 5, and the number itself is not zero, then the number is a multiple of 5.