Posted by **alya** on Thursday, October 6, 2011 at 11:03am.

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.

- PROBLEM SOLVING IN MATHEMATICS -
**Steve**, Thursday, October 6, 2011 at 1:30pm
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

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