2 digits
x and y are the digits
sum of the digits is x+y
x+y=11
10's digit is more than the one's digit
and the number is odd
odd number means that the ones place can be
1,3,5,7,9
10's is more than ones and adds to 11
1 and 10, nope, only single digits allowed
3 and 8, yah
5 and 6, yah
7 and 4, nope, tens is smaller
9 and 2, nope, tens is smaller
65 and 83
it has to be prime
65 is divisble by 5
therfor the number is 83