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….to skin a cat (Posted on 2015-11-09) Difficulty: 3 of 5
The puzzle “Noughts and Crosses” was published in a book intended to train the reader towards his application for Mensa membership.
Basically three upper rows of a 4x4 matrix were given (see below) and the solver was requested to “fill the bottom line of the matrix with a combination of noughts and crosses that logically completes the matrix” (exact quote):

X O O X O X X X X O X X ? ? ? ?

I have found several logical answers in addition to the single “official” answer provided in the book.

I request you solvers to follow suit and to justify all your choices.

Source: will be provided later.

No Solution Yet Submitted by Ady TZIDON    
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Solution Another (whacky) idea Comment 5 of 5 |

Mensa encourages "out-of-the-box" thinking. Here's one:

Regarding this as a matrix, we can get from row 1 to row 2 by reversing the first 3 symbols (X for O and vice-versa), leaving the 4th coulmn unchanged.

Then, go from row 2 to row 3 by reversing the first 2 symbols, leaving the rest unchanged.

Logically, then, go from row 3 to row 4, by reversing just the first symbol and leaving the rest unchanged.

That gives the last line as O O X X.  

Now, I shall return to my box . . .   :-)

  Posted by JayDeeKay on 2015-11-10 11:08:42
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