Test Preparation on Math Test Preparation Problems on Profit And Loss Part 1

The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is:

In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?

A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?

The percentage profit earned by selling an article for Rs. 1920 is equal to the percentage loss incurred by selling the same article for Rs. 1280. At what price should the article be sold to make a 25% profit?