How many groups of 2?, 5, 10, 4, How many groups of 2?, 18, 9, 8, How many groups of 2?, 8, 5, 4, How many groups of 5?, 25, 5, 10, How many groups of 5?, 9, 45, 50, How many groups of 5?, 20, 4, 6, How many groups of 10?, 5, 60, 50, How many groups of 10?, 30, 40, 3, How many groups of 10?, 6, 40, 60.

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