Glass Pouring

Logic Level 2

Coach Newton sets up \(10\) glasses arranged in a triangle as shown, with the glasses numbered \(2, 3, 7, 8, 9\) and \(10\) full of water and the others empty. He challenges the team to rearrange the glasses into the second configuration shown, with full glasses at positions \(B, C, E, G, H\) and \(I\), and in which the triangle points in the opposite direction.

What is the smallest number of glasses the students can move to perform Coach Newton’s challenge?

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