If x = a + and y = a – then x + y - 2x²y² = ?

The present ratio of students to teachers at a certain school is 30 to 1. If the student enrollment were to in...

A worker was hired for 7 days. Each day, he was paid Tk. 10 more than what he was paid for the previous day of...

The average daily wage of 10 workers is Tk.400. If the lowest wage is Tk.300, then what is the possible maximu...

A monkey climbs a 12-meters-high slippery pillar. In his first minute, he climbs 2 meters, and in the next min...

A batsman makes a score of 80 runs in the 16th innings and increases average by 3. What is his average after 1...

After fillings the car's fuel tank, a driver drove from P to Q and then to R. He used 2/5th portion of the fue...