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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)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionHow to do it quicklyMath Man2014-04-12 22:18:40
re(2): How many are divisible by 1?Steve Herman2014-04-10 10:54:39
Solutionre: Thoughts - justifying "20 sec""...SPOILERAdy TZIDON2014-04-09 15:35:05
Thoughtstomarken2014-04-09 12:57:20
re: How many are divisible by 1?Charlie2014-04-09 12:46:01
Solutioncomputer solutionCharlie2014-04-09 12:35:01
How many are divisible by 1?Steve Herman2014-04-09 12:14:36
Hints/Tipsre: Epic FailAdy TZIDON2014-04-09 11:13:11
Epic FailSteve Herman2014-04-09 11:11:19
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