Money can be held in it

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Not chest or box is now discussed. Money can be held in it, but just as we test its metal, within it there is rust. What is it? Check the answer here.

How much does it worth

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How much does it worth to shoot a free throw in a game of basketball? Check the answer here.

Can never see each other

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What two things can always see what the other sees, but can never see each other? Check the answer here.