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83. Stones are falling from top. Rahul hit the stones , each stone with one arrow before it reaches at ground. Few stones(x) he hit become double before falling, few stones he hit become 1/3rd before falling to ground,2/3rd vanishes and other stones he coud not hit. He finds that no. of stones which become double were least and stones which on hitting bcm 1/3rd were maximum among three categories.
Find each number of stones if total stones on ground is 31