Abstract: A number problem game which comprises a playing board having a planar surface thereon, with an odd number of squares arranged in an equal number of horizontal and vertical rows intersecting each other on the playing board, as well as a plurality of playing elements with each element having a different numbered indicia thereon. The elements being arrangeable on the squares of the board to satisfy a predetermined value which is satisfied by the arithmetical equation: ##EQU1## such that when the plurality of elements are properly positioned on the squares, the sum of the numbered indicia on the elements on each of the horizontal and vertical rows is equal to X, and a plurality of borders on the playing board in surrounding relationship to respective groups of odd numbers of the squares are provided. Each one of the borders having indicium thereon equivalent to one of the predetermined values of X.

Abstract: A number problem game which comprises a playing board having a planar surface thereon, with an odd number of squares arranged in an equal number of horizontal and vertical rows intersecting each other on the playing board, as well as a plurality of playing elements with each element having a different numbered indicia thereon. The elements being arrangeable on the squares of the board to satisfy a predetermined value which is satisfied by the arithmetical equation:[.sqroot.n (a + N)[/2 = Xsuch that when the plurality of elements are properly positioned on the squares, the sum of the numbered indicia on the elements on each of the horizontal and vertical rows is equal to X, and a plurality of borders on the playing board in surrounding relationship to respective groups of odd numbers of the squares are provided. Each one of the borders having indicium thereon equivalent to one of the predetermined values of X.