The difference between the ages of two brothers is a prime number. Sum of their ages is also a prime number. If the elder brother is 28 years old, how many different values can the age of the younger brother take?

• 3 different values of age are possible for younger brother.(25,15 & 9) ..solved by agrawal ji (AKASH)...KIIT
• 6 years agoHelpfull: Yes(0) No(1)