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This puzzle is part of the Monthly Topic Challenge #14: Think inside the (very small) box!.

6 different, 3 digit primes are stacked here in two layers.
You only see the sum of overlapping digits.

enter image description here

Find the 6 primes.

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1 Answer 1

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The 6 different primes are:

Row 1: 113
Row 2: 101
Row 3: 601
Column 1: 281
Column 2: 401
Column 3: 313

Deductions (I solved it with regular expressions in a list of all prime numbers from 101-997):

 -> Column 2:  /[1-5]01/           -> 101, 401
-> Row 1: /[12][14][0-5]/ -> 113, 211, 241
-> Row 2 /[1-9]0[0-2]/ -> 101, 401, 601, 701
-> Row 3: /[1-7]0[0-4]/ -> 101, 103, 401, 503, 601, 701
-> Column 3: /[35]1[13]/ -> 311, 313
-> Row 1: /..3/ -> 113
-> Column 2: /4../ -> 401
-> Row 2: 401 -> 101, 601, 701
-> Column 1: /2[832][0-6]/ -> 223, 233, 281, 283
-> Row 3 /^[46]/ -> 401, 601 -> 601
-> Column 3: /..3/ -> 313
-> Row 2: 401, 601 -> 101, 701
-> Column 1: /..1/ -> 281
-> Row 2: /1../ -> 101

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