Find the degree of the polynomial  $$8x^4 + 2x^2y^3 + 4$$

Ratul and Pratul together can complete a task in 18 days. They start the task together, but Ratul had to leave 7 days before the work got over. As a result it took a total of 23 days to complete the task. How many days would it have taken Pratul to complete the work by himself?

$$x = \frac{\sqrt{3} + 1}{2}$$; find $$4x^3 + 2x^2 - 8x + 7$$

The square of 11111 is:

When a 50 decimeter long ladder is placed with the wall, it reaches upto the window only. If the window is 48 decimeter up from the land, then find out the distance of the lower face of the ladder from the wall.