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A puzzle that requires formal logical deduction to arrive at the solution. This suggests more than merely reasoning through clues to find an answer (you might want [situation] for that).

1
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Many questions that allow brute forcing have an obligatory answer "I wrote a program!". Those are usually less fun to read, than logical reasoning, but for some people (including me) they are a great …
answered Feb 13 '20 by Andrew Savinykh
6
votes
If I understood the puzzle correctly, it's a nice and easy puzzle, and the only reason it has not been answered by now, is the lack of clarity in how it's worded. Here is my take on it: Below, is h …
answered May 8 '20 by Andrew Savinykh
3
votes
If a is the first digit b is the second and third and d is the last, then 20*a + 2*b = 10*b + d because its last two digits are double the first two digits. Or, simplifying 20*a = 8*b + d Beca …
answered Jan 21 '16 by Andrew Savinykh