Easy

If you look you cannot see me

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If you look you cannot see me. If you see me you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I? Check the answer here.

You throw away the outside

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You throw away the outside, eat the inside, and throw away the inside. What is it? Check the answer here.

How many houses did you count

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If you count 20 houses on your right going to the store and 20 houses on your left coming home, how many houses did you count? Check the answer here.