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.

and my guess must have been the official solution, is all O's, as the game must finish with as many O's as X's.

Posted by Charlie on 2015-11-09 12:38:10