A girl goes to a shop to buy 10 pencils. The brother told her that if she answers the riddle correctly, he will give one pencil free. If 7 pencils would cost you Rs 6 more than 5 pencils, then find the cost of your 10 pencils.
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Fire is a chemical reaction that creates light and heat from oxygen and fuel. A lit candle needs to draw oxygen from the air in order to continue burning. If you limit the amount of air available, the candle's flame eventually goes out once it uses up all the oxygen.
Step-by-step explanation:
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