A man buys two articles for ₹600 each. He sells one at a profit of 10% and the other at a loss of 10%. What is his overall profit or loss?

By selling 45 lemons for ₹40, a man loses 20%. How many lemons should he sell for ₹24 to gain 20%?

A shopkeeper marks his goods 40% above cost price and gives a discount of 10% on the marked price. What is his profit percentage?

The cost price of 20 articles is equal to the selling price of x articles. If the profit is 25%, find x.