The cost price of 16 boxes of strawberries is equal to the selling price of 20 boxes of strawberries. Find the gain or loss percentage.

Find the single discount which is equivalent to two successive discounts of 25% and 20% given on an article.

A woman bought some eggs at the rate of 4 eggs for Rs.18 and sold them at the rate of 5 eggs for Rs. 24. She gained Rs. 90 in selling all the eggs. How many eggs did she buy?

A water heater is sold by a trader for Rs. 10502 including GST at 18% . Find the marked price of the water heater and GST.

A family went to a hotel and spent Rs. 350 for the food and paid extra 5% as GST. Calculate the CGST and SGST.