Cubes and Target Numbers

You’ll need both mathematical and spatial skills to solve this one! Fit the pieces on the right into the diagram on the left so that the numbers on the surfaces of each lettered row (from A to A, B to B, etc.) add up to the target number, which in this case is 90. Do not rotate the pieces or attempt to fit a piece into a section of the diagram that does not match the piece exactly. For example, the single panel in the middle of row E in the diagram can be covered by one of the single panels with the number 9, 15, 20, or 22. Use the target number and logic to figure out which other pieces belong in that row; and continue in the same manner until all the pieces have been placed.

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