Quad Sums: Each circle indicates that one of the four digits it touches is the sum of the other three. All such circles are given.
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Solution code: Row 6, followed by column 5 (14 digits, no spaces).
on 21. January 2022, 15:56 by grkles
Fixing error in solution code.
on 21. January 2022, 15:52 by Playmaker6174
3:)
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