To simplify the expression \(24 \div 4 \times 2 + 8 - 4\), we apply the order of operations (PEMDAS/BODMAS):
1. Division: \(24 \div 4 = 6\). The expression becomes \(6 \times 2 + 8 - 4\).
2. Multiplication: \(6 \times 2 = 12\). The expression becomes \(12 + 8 - 4\).
3. Addition: \(12 + 8 = 20\). The expression becomes \(20 - 4\).
4. Subtraction: \(20 - 4 = 16\).
The simplified result is 16.
If x + 1/x = 5, what is the value of x² + 1/x²?
A shop sells a book for 240 rupees after giving a 20 % discount on the marked price. What is the marked price of the book?