1.Find the minimum sum of three 3-digit primes, using all non-zero digits.

2.What is the smallest possible sum of primes which are formed using each of the digits 1 through 9?

[1]
339 = 113 + 113 + 113 
(371 = 113 + 127 + 131, if the three zeroless primes are each different)

[2]
207 = 2 + 3 + 5 + 41 + 67 + 89
207 = 2 + 5 + 7 + 43 + 61 + 89

Posted by Dej Mar on 2012-08-04 13:31:11