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 A progressive addition (Posted on 2014-05-19)
```   ##
##
###
+ ###
####
```
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 No Rating 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 re: Other solutions tomarken 2014-05-19 14:02:46 Other solutions tomarken 2014-05-19 13:39:33 Trial & Error Bryan 2014-05-19 13:01:37
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