Question : 12 copies of a book were sold for Rs. 1700, thereby gaining the cost price of 3 copies. The cost price of a copy of the book is:

Question : Akshay has 30 articles, each having the same cost price. He marked the price of each article at 30% above its cost price. He sold 15 of the articles at a discount of 20% each, and the remaining 15 articles at a discount of 10% each, thereby gaining a total profit of Rs. 630.

Question : A shopkeeper sold a book at a marked price of Rs. 1400 at a discount of 28%. Find the selling price of the book.

Question : An article was sold at a loss of 14%. If it was sold for Rs. 756 more, then there would have been a gain of 7%. Find the cost price of the article.

Question : By selling a coat for Rs. 630, a shopkeeper gains 5%. Find the cost price of the coat.