Two successive discounts of 20% and 30% are given while selling an article. What is the ratio of the marked price of the article to its selling price?

If the shopkeeper sold the mobile for Rs.15000 and then he gets some loss. If he sold the same mobile at Rs.19200 and then he gets profit is double of loss. Find the cost price of the mobile?

The compound interest on a certain sum for first two successive years are Rs. 100 and Rs. 172 respectively. Find the rate of interest.

Virat starts a business with Rs.6,500 and after 8 months Sohan joins Virat as his partner. After 4 years the profit is divided in the ratio of 13 : 12. What is Sohan contribution in the capital?

What is the value of a²+b²+c²-2ab-2bc+2ca?

Answer the following questions

At a simple interest Rs. 3050 becomes Rs. 4026 in four years. If the interest rate was increased by 4% how much would Rs.7500 become in four years ?

Direction: What value will come in place of the question mark (?) in the following question?

14, 15, 31, 94, 377, ?

If the area of a circle and the square are equal then the ratio of their perimeter is