Question

both the two digit number n1 and n9 are prime numbers if n is not a prime number find the sum of all the positive values of n1+n9
​

Answer 1

Given Two Digit number n1 and n9  are prime numbers

n is not a prime number

To Find :   sum of all positive values of n1+n9

Solution:

n is not a prime number hence n can be

1 , 4 , 6 , 8 , 9

11  and 19 are prime numbers

41 and 49  ( 49 is not prime number )

61 and 69  ( 69 is not prime number)

81 and 89  ( 81 is not prime number )

91 and 99 ( 91 and 99 are not prime numbers)

Hence  Only possible pair is

11 and 19

11 + 19  = 30

sum of all positive values of n1+n9   is  30

Learn More:

Write 675 as the product of powers of two prime numbers.​ - Brainly.in

brainly.in/question/12246399

find the truth value of all prime numbers are either even or odd ...

brainly.in/question/9141870