11. If the cost price of 8 articles is the same as the selling price of 10 articles. Find the gain or loss percentage? 


12. If the selling price of 8 articles is same as the cost price of 12 articles. Find the gain or loss percentage? 


13. If the cost price of 15 articles is same as the selling price of 25 articles. Find the gain or loss percentage? 


14. Balloons are bought at 12 for Rs.10/ and sold at 10 for Rs.12/. Find the gain or loss percentage? 


15. Balloons are bought at 8 for Rs.10/ and sold at 10 for Rs.8/. Find the gain or loss percentage? 


16. Apples are bought at 7 for Rs. 9/ and sold at 9 for Rs. 7/. Find the gain or loss percentage? 


17. A dealer sells his goods at cost price 750gm weight for 1 kg his gain or loss percentage is 


18. A dealer sells his goods at cost price 950gm weight for 1kg his gain percentage is 


19. A dealer sells his goods 10% less at cost price uses 850gm weight for 1kg his gain or loss percentage is 


20. A single discount equivalent to successive discount of 20%, 10% is 


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