8 steps

Step 1: Before you are 3 glasses, 2 of which stand upside down.

Step 2: It is given the task - for 3 turns to put all 3 glasses on their base.

Step 3: Condition: for 1-in turn it is necessary to turn over 2 glasses at the same time. All glasses should be in the correct position only after the third move.

Step 4: Do you want to see how this should be done?

Step 5: The answer is: step one.

Step 6: Answer: step two.

Step 7: Answer: step three.

Step 8: That's all! Now all glasses are right!

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