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steve bought toffees at 6 for rs1 if he sells x toffees for rs1 to gain 20%.what is x?

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the population of india increase by 25% annually if the present population is 1crore.then what is the difference between the population 3yrs ago and 2yrs ago after charan gave ram 50% of his money he had 20% as much as he had now.what is the 75% of the amount ram had orginally and 150% of the amount charan had orginally?