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A Quicky III (Posted on 2014-04-09) Difficulty: 1 of 5
If each of the a,b,c,d is a decimal digit - for how many ordered quadruplets (a,b,c,d) is the sum S= a+b+6c+d divisible by 3 ?

Answer: within 20 sec.

No Solution Yet Submitted by Ady TZIDON    
Rating: 5.0000 (1 votes)

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Epic Fail | Comment 1 of 9
I worked on this for 20 seconds, but then time expired, so I put down my mental pencil.
  Posted by Steve Herman on 2014-04-09 11:11:19
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