Any number, including prime numbers, can be multiplied by 1.
The six times tables are any and all multiples of 6. Therefore, any numbers that divide evenly by 6 will be in the six times tables, and any that don't won't be. 90/6 = 15, and so 90 does divide evenly by 6. Thus, 90 is in the six times tables.
Once you multiply a prime by any number other than 1, it becomes composite.
There are no two numbers that can be multiplied to get 19; 19 is not divisible by any number.
Prime numbers are divisible because any numbers that are divisible are prime. If a number isn't divisible, it isn't prime. Prime numbers have to be divisible by at least one pair of numbers to be prime.
Think of the definition of a prime number: It has no divisors other than itself and 1 so it cannot be a multiple of any other numbers.
Any number, including prime numbers, can be multiplied by 1.
The six times tables are any and all multiples of 6. Therefore, any numbers that divide evenly by 6 will be in the six times tables, and any that don't won't be. 90/6 = 15, and so 90 does divide evenly by 6. Thus, 90 is in the six times tables.
Once you multiply a prime by any number other than 1, it becomes composite.
A way to do this is to spot any obvious prime factors. In this case, 275 ends in a 5 and so is divisible by 5. Doing that gives 275/5 = 55. This is now clearly the product of 5 and 11, from times tables. Thus 275 as a product of prime numbers is 5x5x11
Any two prime numbers will be relatively prime. Numbers are relatively prime if they do not have any prime factors in common. Prime numbers have only themselves as prime factors, so all prime numbers are relatively prime to the others.
There are no two numbers that can be multiplied to get 19; 19 is not divisible by any number.
Co-prime numbers, relatively prime numbers and any set of prime numbers.
Prime numbers are divisible because any numbers that are divisible are prime. If a number isn't divisible, it isn't prime. Prime numbers have to be divisible by at least one pair of numbers to be prime.
Any number that is not a prime number.. . .Prime numbers: 1,3,5 and 7
The factors of any prime numbers are 1 and the numbers themselves.
Perhaps the fact that they are prime numbers!