Six glasses are in a row. The first three are filled with milk, and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?
by 
aishwarya
ANSWERS: 3
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Sure can. Pour the milk from the middle glass of the 3 glasses with milk in them into the middle glass of the 3 without.
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Pick the second filled glass, pour the contents in the second empty glass and place it back. That way your arrangement would look from this, FULL-FULL-FULL-EMPTY-EMPTY-EMPTY to, FULL-EMPTY-FULL-EMPTY-FULL-EMPTY
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Who's going to drink all the milk?
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