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Counting triplets III (Posted on 2011-11-14) Difficulty: 2 of 5
Consider three prime numbers A, B and C with A ≤ B ≤ C ≤ 20, and determine the total number of triplets (A, B, C) such that the respective last digits of A+B+C and A*B*C are the same. No computer programs!

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
SolutionsolutionCharlie2011-11-14 16:07:47
SolutionanswerDej Mar2011-11-14 13:49:28
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