PROBLEM SOLVING IN MATHEMATICS
posted by alya on .
there are two prime numbers between 100 and 199 such that the ten digits is a prime number, the ones digit is a prime number and the tens and ones digits taken together are a 2 digit prime number. find the sum of these 2 prime number.

1ab
a prime = 2,3,5,7
b prime = 2,3,5,7
ab = 23,37,53,73
numbers are 137 and 173
sum = 310