The value of \(25\% \text{ of } 720 + 57 \div 19 \times \tfrac{1}{3} \text{ of } \tfrac{100}{11} \text{ of } \tfrac{33}{25} - 15\% \text{ of } 300\)is:
If \(x^2 + \frac{1}{x^2} = 7\) , then what is the value of \(x^3 + \frac{1}{x^3}\)?
The following pie-chart shows the sale of different vegetables in a day of a shop. It total 1000kg of vegetables were sold in a day, then what is the amount of tomatoes sold (in kg) ?
If A + B = -5 and AB = 6, then find the value of A3 + B3 .