Black when you buy it red when you use it


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I am black when you buy me, red when you use me and gray when you throw me away. What am I?

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I am black when you buy me , red when you use me and grey when you throw me away . what am I ?


Answer:  \bold{CHARCOAL}


Few lines -


The given question is the riddle which is interesting one . The hints are given in the question itself .


The thing is black when we buy and it turns into red when we used . It means - "Charcoal".


Charcoal is a lightweight black substance that can be used as fuel.


Charcoal is produced by heating of wood and other substances .


While heating coal, it becomes red and after complete burning its ashes becomes grey which we throw away.


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