Question

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

Answer 1

Its coal.

Because whn u buy it, it is black, whn u use it, (mostly in cold days to get warmth) it becomes red and after burning, it becomes in the form of ash that is grey in color.

Therefore, coal is the answer to ir question

Answer 2

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.