Cost Price and Selling Price — Prelims Questions

A shopkeeper sells an article for ₹1200, making a profit of 20%. If he had sold it for ₹1050, what would have been his profit or loss percentage?

A dealer allows a 10% discount on the Marked Price of an article and still makes a profit of 20%. If the Cost Price of the article is ₹900, what is its Marked Price?

A dishonest shopkeeper sells goods at Cost Price but uses a weight of 800 grams instead of 1 kg. What is his actual profit percentage?

An article is sold at two successive discounts of 20% and 10%. If the Marked Price of the article is ₹2500, what is the final Selling Price?

A man buys 10 articles for ₹8 and sells them at 8 articles for ₹10. Find his profit or loss percentage.