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Counting Quadruplets III (Posted on 2011-02-06) Difficulty: 3 of 5
Determine the total number of quadruplets (A,B, C, D) of positive integers with A ≤ B ≤ C ≤ D ≤ 25, such that (A+B)*(C+D) is divisible by |A*D B*C|, whenever A*D ≠ B*C.

Note: |x| refers to the absolute value of x.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Some ThoughtsFULLY DEBUGGED; thanksAdy TZIDON2011-02-07 16:20:47
re(3): computer solution ... Do me a favor , CharlieCharlie2011-02-07 14:15:35
re(2): computer solution ... Do me a favor , CharlieCharlie2011-02-07 12:30:22
re(2): computer solution ... Do me a favor , CharlieCharlie2011-02-07 12:20:15
Some Thoughtsre: computer solution ... Do me a favor , CharlieAdy TZIDON2011-02-07 01:51:06
Solutioncomputer solutionCharlie2011-02-06 17:36:56
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