venn diagram [sorting numbers to venn diagrams] [multiples of 4/5/4-5]

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This is a 3 category Venn Diagram shown here in a 4 x 4 grid. There are blue rectangles, red rectangles and where they overlap purple rectangles. There is a pile of 16 numbers. Some are multiples of 4 [they go in the red rectangles], some are multiples of 5 [they go in the blue rectangles] and some are multiples of 4 and 5 [they go in the purple rectangles]. Drag 15 of the 16 pictures from the pile and drop them into the grid. Do not bother about sorting at this stage as you can rearrange the position of the pictures at any time. *Take care however, !!! when you drag in your last picture the grid becomes FROZEN. To restart the activity just refresh the page.