Respuesta :

Answer:

The number is: 775

Step-by-step explanation:

The prime numbers from 1-9 are: 2,3,5,7

To form the greatest three digit prime number where each of the digits is prime and the sum of all three digits is also prime:

  • we have to start the number from 7 as the greatest prime number is 7.
  • the next digit has to be also 7 so that the number remains bigger.
  • if for the ones digit we take prime number seven than the sum of all the three digits will not be prime ( as 7+7+&=21 which is not a prime number).

      so we take the digit 5 and the sum will be 19(7+7+5) which is a prime  

           number.

Hence the number is 775.


lolajohnson20

Answer:

What about 773. oh wait sorry. GREATEST