Each symbol in the grid below represents a number. The sums of the
symbols in the first, second, and bottom rows and the leftmost and
rightmost columns are shown.
A four by four grid with a
triangle, a circle, a square or a hexagon in each square.
The first row has four triangles with the number \(20\) to the right of the row.
The second row, from left to right, has triangle, circle, square,
hexagon with the number \(17\) to the
right of the row.
The third row has circle, circle, square, hexagon with a question
mark to the right of the row.
The fourth row has circle, triangle, circle, square with the
number \(15\) to the right of the
row.
