perplexus.info :: Numbers : A Quicky III

A Quicky III (Posted on 2014-04-09)

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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| 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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