1. A man buys an article for $500 and sells it at a profit of 25%. If he had sold it for $50 more, he would have gained 40%. What is the cost price of the article?
2. A merchant sells two articles at the same price. If he gains 10% on one and loses 10% on the other, what is the overall percentage loss or gain?
3. A man sold an item at a loss of 10%. If he had sold it for $20 more, he would have gained 10%. What is the cost price of the item?
4. A trader allows a discount of 20% on the marked price of an article and still makes a profit of 10%. What is the profit percentage if no discount was given?
5. If a shopkeeper buys 3 items for $240 and sells 2 of them for $200 each, what is the profit percentage on the 2 items sold?
6. A trader buys 10 items for $1000 and sells them for $1100. What is his profit percentage?
7. A man bought an article at a price which is 20% less than the marked price. If he sells the article at a 10% profit, what is the profit percentage on the marked price?
8. A person sells a pair of shoes at a loss of 12%. If the cost price was $200, what is the selling price?
9. A person bought an article and sold it at a profit of 18%. If the cost price was $150, what is the selling price?
10. A shopkeeper sold 5 items for $200 each. He made a total profit of 25% on the cost price. What was the total cost price of the 5 items?