A fruit seller had some watermelons. He sells 45% of the watermelons and still has 495 watermelons left. How many watermelons he originally had?
The marked price of a chair is Rs. 1,650. This chair is sold at two successive discounts of 10 percent and 20 percent. What is the selling price of chair?
If \(x+\frac{1}{x}=2K\) , then what is the value of \(x^4+\frac{1}{x^4}\) ?
What is the value of a2 + 4b2 + 9c2 - 4ab + 12bc - 6ca?