(1) A man sells an article at a gain of 5%. If he had sold it at Rs. 63 less he would have lost 2%. Find out the cost price.

(2) Ball point pens were sold at a loss of 20%. If they had been sold at Rs, 70 more there would have been a gain of 3-1/3 percent.Find the cost price.

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1) Let cost price (C.P.) of the article be Rs x

Then S.P. at 5% gain 

and S.P. at 2% loss 

According to the question

Hence the required cost is Rs 900

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