Jane has a 4 × 4 grid to be filled with colorful blocks. There are

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Jane has a 4 × 4 grid to be filled with colorful blocks. There are blocks of four different colors: red, green, blue, and yellow.She arranges the four blocks in such a

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A 4x4 grid is covered with 16 tiles. 4 of each: red, black, green, yellow. Each row must contain one tile of each colour. Each pair of tiles that touch along a

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Jane has a 4 × 4 grid to be filled with colorful blocks. There are blocks of four different colors: red, green, blue, and yellow.She arranges the four blocks in such a

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