Rules: Draw a path that passes through every empty cell and loops back to itself. The path may not branch or intersect itself, and can only connect cells orthogonally (but not diagonally). This puzzle...
Rules: Draw along the dotted lines to divide the grid into rectangular regions. Every region must contain exactly one black circle, and the number in a circle indicates the size of the region it is in....
Fill in the blank gray squares with +, -, x, ÷, or =, and the blank white squares with integers between 1 and 9 so that each row and column forms a complete, mathematically correct equation that follows...
