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A progressive addition (Posted on 2014-05-19) Difficulty: 3 of 5
+ ###
In the above addition all the digits were replaced by "#".
Please restore the original numbers, given that in each column the digits form a valid arithmetic progression.

Based upon a puzzle by Polish mathematician Marek Penshko.

  Submitted by Ady TZIDON    
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Solution: (Hide)
74 + 63 + 752 + 641 = 1530
Is the only solution with d=-1.
For other values of d, including the trivial d=0 see tomarkin's posts.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Solutionre: Other solutionstomarken2014-05-19 14:02:46
SolutionOther solutionstomarken2014-05-19 13:39:33
SolutionTrial & ErrorBryan2014-05-19 13:01:37
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