Mr. Rodriguez is packing bags of snacks for his children’s lunchboxes. He plans to use 20 blueberries and 30 grapes. Each snack bag will have the same number of blueberries and grapes. How many bags can he make if each bag needs to be the same?

To make the greatest number of identical bags without leftovers, find the greatest common factor of 20 blueberries and 30 grapes. The greatest common factor is 10, so he can make 10 bags, each with 2 blueberries and 3 grapes. The correct choice is 10 bags.

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